Earbuds / Compare

Ozlo Sleepbuds 2 vs Skullcandy Method 540 ANC

A

Product A: Ozlo

Sleepbuds 2

52 of 166 known

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B

Product B: Skullcandy

Method 540 ANC

59 of 166 known

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All 166 fields

Every value links to where we found it.

Only differences

AOzlo Sleepbuds 2

BSkullcandy Method 540 ANC

General

6 of 8 differ

Series

Sleepbuds1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026The product page and its user guide pages call the line Sleepbuds. The first generation is the Ozlo Sleepbuds.

Method1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Maker line name Method, as in Method 360 ANC.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

010021C01WW012Maker product pageozlosleep.com/products/sleepbuds.jsRead 15 October 2026US store product data: SKU 010021C01WW01, a single variant.

S2MFW-T001, S2MFW-T987, S2MFW-T7401Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Store product data SKUs: S2MFW-T001 Bone, S2MFW-T987 Primer, S2MFW-T740 True Black.2Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbuds.jsonRead 15 October 2026Store product data SKUs for the three colours.

GTIN / EAN

8500709611652Maker product pageozlosleep.com/products/sleepbuds.jsRead 15 October 2026US store barcode field: 850070961165. The Europe and UK store feeds list the same SKU and barcode.

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

28 July 20263Press articlesoundguys.com/ozlo-sleepbuds-2-launch-160755Read 15 October 2026The Tom's Guide launch review is dated 28 July 2026 and says the Sleepbuds 2 launch today.4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Published 28 July 2026: the Sleepbuds 2 launch today.7Press articletechcrunch.com/2026/07/28/ozlos-sleepbuds-2-build-on-boses-sleep-earbud-legacyRead 15 October 2026Unveiled on Tuesday 28 July 2026.

8 January 20268Press articletechradar.com/audio/earbuds-airpods/skullcandys-new-earbuds-put-ai-in-your-ears-but-theres-a-catchRead 15 October 2026Article dated 8 January 2026: the newly launched Method 540 ANC.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: unveiled on January 8, 2026 at the annual CES tech conference.

Status

Available2Maker product pageozlosleep.com/products/sleepbuds.jsRead 15 October 2026US store lists the product as available on 2026-10-15.

Available1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Store page has an Add to cart button at 149.99 USD.8Press articletechradar.com/audio/earbuds-airpods/skullcandys-new-earbuds-put-ai-in-your-ears-but-theres-a-catchRead 15 October 2026Available now in the US per the article.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$2791Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026The US store lists 279 USD with a free sleep mask for a limited time. SoundGuys news and the Tom's Guide launch review give the 279 USD launch price.3Press articlesoundguys.com/ozlo-sleepbuds-2-launch-160755Read 15 October 2026SoundGuys news, 29 Jul 2026: Ozlo Sleepbuds 2, a 279 USD pair.4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Review: launching with a sale price of 279 USD.7Press articletechcrunch.com/2026/07/28/ozlos-sleepbuds-2-build-on-boses-sleep-earbud-legacyRead 15 October 2026TechCrunch, 28 Jul 2026: priced at 279 USD, 30 USD above the original Sleepbuds. A sleep mask and travel case come with a purchase for a limited time.

$149.991Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026US store price 149.99 USD, the same as the launch reporting. Excludes sales tax.8Press articletechradar.com/audio/earbuds-airpods/skullcandys-new-earbuds-put-ai-in-your-ears-but-theres-a-catchRead 15 October 2026Available now in the US for 149.99 USD.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US, EU, GB1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026US store plus Europe (ozlosleep.eu) and UK (ozlosleep.co.uk) stores. Documented subset. The warranty is 1 year in the US and 2 years in the EU and UK. No euro or pound launch price is stored, since only current store prices were found.

US, GB, EU, CA1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026US store. The UK, EU and Canada stores list the same three SKUs in their product data.3Maker product pageskullcandy.co.uk/products/method-540-anc-noise-canceling-earbuds.jsonRead 15 October 2026UK store product data lists the same SKUs, priced in GBP. GBP is not stored.4Maker product pageskullcandy.eu/en-de/products/method-540-anc-noise-canceling-earbuds.jsonRead 15 October 2026EU store product data lists the same SKUs, priced in EUR. No launch price source was found for the EU, so no EUR price is stored.5Maker product pageskullcandy.ca/products/method-540-anc-noise-canceling-earbuds.jsonRead 15 October 2026Canada store product data lists the same SKUs, priced in CAD.

ColoursiThe maker's own colour names

Not available

Bone, Primer, True Black1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Colour selector: Bone, Primer and True Black. TechRadar saw only black and white at its review time.2Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbuds.jsonRead 15 October 2026Store product data: option values Bone, Primer and True Black.

Segment

Sleep1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Maker: sleep earbuds, designed for sleep only.

Music1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Maker sells it as noise canceling earbuds for everyday and on-the-go listening. The store tags include gym and travel. Stored as music, not as sport.

Design

1 of 4 differ

Form factoriIn-ear seals the ear canal with a tip. Semi-in-ear rests in the outer ear without a seal. Open-ear leaves the ear canal unobstructed.

In-ear1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Passive noise cancellation via silicone tips (not ANC). The silicone tips seal the ear.5Reviewsoundguys.com/ozlo-sleepbuds-2-review-161143Read 15 October 2026Review: passive isolation depends on how well the silicone tips seal in your ears.

In-ear1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Page: ear gels and fit fins in S, M and L. The store tags the product as in ear.

Bud shapeiStem describes an extending control or microphone stalk. Stemless describes a compact body without a stalk.

Stemless1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026The earbuds are a small low-profile body with no stalk, as shown on the product page. A silicone tip with a wing carries each body.

Stemless1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Page gallery shows a compact earbud body with a gel tip and no stalk.

Use one bud aloneiWhich earbud can operate alone. This does not mean two earbuds can play from different sources.

Not available

Either bud1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Page feature list: Use Either Bud Solo.

RGB lighting

Not available

Not available

Drivers and sound

7 of 17 differ

Drivers per budiAudio transducers in one earbud. Rows distinguish their type, acoustic role and published diameter. Do not count microphones.

AOzlo Sleepbuds 2

Type
Balanced armature

Source16Press articleaudioxpress.com/news/ozlo-launches-sleepbuds-2-expanding-sleep-earbuds-as-a-specialized-audio-categoryRead 21 October 2026Same sentence names one new balanced armature driver. No count, role or size is stated, so only the type is stored.

BSkullcandy Method 540 ANC

Diameter (mm)
12

Source1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Driver Diameter 12mm. The page does not state the driver type, the role or the count per earbud.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: 12mm drivers with tuning by Bose.

Driver typeiPublished transducer technology. High-excursion, composite and neodymium do not by themselves establish a driver type.

Balanced armature16Press articleaudioxpress.com/news/ozlo-launches-sleepbuds-2-expanding-sleep-earbuds-as-a-specialized-audio-categoryRead 21 October 2026audioXpress, launch news: Ozlo says Sleepbuds 2 use a super-efficient custom audio amplifier paired with a new balanced armature driver. The maker product page, help center and press release name an amplifier but no driver type.

Not available

Driver sizeiLargest explicitly published circular driver diameter in one earbud. A rectangular driver width is not a diameter.

Not available

12mm=CalculatedFrom Drivers per bud

Drivers per budiTotal audio transducers in one earbud, summed from explicit driver quantities. A row with an unknown quantity makes the total unknown.

Not available

Not available

Diaphragm material

Not available

Not available

Frequency responseiPublished acoustic frequency response of the earbuds. Codec transmission bandwidth alone does not qualify. Conditions belong in the source note.

Not available

Min20 HzMax20 kHz1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Frequency Response 20Hz - 20KHz. Test conditions are not stated.

Impedance

Not available

16Ω1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Impedance 16 Ohm.

SensitivityiPublished acoustic sensitivity. The electrical reference and frequency must be stated in sensitivity_reference or the source note.

Not available

Not available

Sensitivity reference

Not available

Not available

Max sample rateiHighest supported audio sample rate under the codec and source-device conditions in the source note. This does not establish lossless playback.

Not available

Not available

Max bit depthiHighest supported audio bit depth under the codec and source-device conditions in the source note. Bluetooth version alone does not establish this.

Not available

Not available

Adaptive EQiAn inner mic tunes the sound to your ear in real time

Not available

Not available

Personalised soundiA profile from a hearing test or ear scan

Not available

Not available

Onboard EQ

Not available

Not available

Custom EQ bandsiNumber of independently adjustable custom equalizer frequency bands. Availability may require current firmware, an app or a compatible device.

Not available

51Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Customizable 5-Band EQ Mode.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Preset EQ and custom 5-band EQ section.

EQ presetsiNamed equalizer sound presets. Noise-control modes and spatial-audio modes are separate features.

Balance, Focus, Spoken Word, Airplane Mode4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Audio Tuning profiles in the app: Balance, Focus, Spoken Word and Airplane Mode. Ozlo calls this tuning. It changes the audio for the content or the setting.

Music, Bass Boost, Podcast1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: 3 Preset EQ modes (Music, Bass Boost and Podcast). The help page adds a Custom mode, which is not stored as a preset.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Preset EQ section lists Music, Bass Boost, Podcast and Custom. One sentence also names movies, which the list does not. Custom is not stored as a preset.

Volume limit

Not available

Not available

Spatial audio

None of 2 known

Spatial audioiNamed spatial or surround audio processing supported with the source and platform conditions stated in the source note.

Not available

Not available

Head trackingiSpatial audio changes with head movement. Static spatial processing alone does not qualify. Compatible device or content requirements belong in the source note.

Not available

Not available

Noise cancelling

5 of 11 differ

Active noise cancelling

No1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Tech specs, Noise Masking: passive noise cancellation via silicone tips (not ANC). FAQ: block and replace noise masking is different from active noise cancellation.

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Adjustable 4-Mic Active Noise Canceling.

ANC typeiFeedforward uses exterior microphones. Feedback uses interior microphones. Hybrid uses both. Adaptive control is separate from microphone placement.

Not available

Hybrid7Maker product pageskullcandy.com/blogs/the-feed/sound-by-bose-method-360-540-ancRead 15 October 2026Maker blog: adjustable 4-mic hybrid ANC. The same blog lists 42 hours with ANC off, wear detection and LE Audio in a side-by-side table that shares values with the Method 360 ANC. Those three claims are not stored because the product page and help page do not state them.

ANC microphones in both earbudsiPhysical microphones used by ANC across the pair. A shared call and ANC microphone counts once. Case microphones and vibration sensors are excluded.

Not available

41Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: adjustable 4-mic active noise canceling. Four microphones across the pair.

Adaptive ANCiANC strength or calibration adjusts automatically to noise, fit or ear acoustics. The source note states the adjustment conditions.

Not available

Not available

ANC levelsiNumber of selectable ANC strength levels. Excludes ANC off, transparency and activity profiles unless they explicitly set distinct strength levels.

Not available

Not available

ANC attenuation (claimed)iManufacturer maximum claimed noise attenuation. Frequency and measurement conditions belong in the source note. This is not reviewer-measured overall attenuation.

Not available

Not available

Transparency mode

No8Press articlethe-gadgeteer.com/2026/07/29/ozlo-sleepbuds-2-sleep-earbudsRead 15 October 2026Article of 29 Jul 2026: no microphone array, no transparency mode and no calls. The earbuds have no microphones, so a transparency mode cannot exist.

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Adjustable Stay-Aware Mode.

Adjustable transparency

Not available

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Adjustable Stay-Aware Mode. The help page describes a slider in the app.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Adjustable ANC and Stay-Aware section: a slider in the app sets the Stay-Aware level.

Automatic ANC and transparency blendiAutomatically blends active cancellation with ambient sound. Automatic activity-based switching between separate modes alone does not qualify.

Not available

Not available

Conversation detection

Not available

Not available

Wind noise reductioniA documented physical design or processing feature for reducing wind noise. The source note distinguishes mesh or shape changes from selectable processing.

Not available

Not available

Measured

None of 23 known

Frequency response notes (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Bass amount (measured)iDeviation from the review source target in the bass range. Positive means more bass. Target, test method and settings belong in the source note.

Not available

Not available

Treble amount (measured)iDeviation from the review source target in the treble range. Positive means more treble. Values from different targets may not be directly comparable.

Not available

Not available

Deviation from target (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Consistency between fittings (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Harmonic distortion (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Sound leakage (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Noise isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Noise isolation, best (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Passive isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Call quality notes (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic low-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic high-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic speech-to-noise ratio (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Latency (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Bluetooth latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

2.4 GHz latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Latency in game mode (measured)iThe best case the buds can reach. Measured by a reviewer

Not available

Not available

Battery life (measured)iReviewer-tested operation from one full charge of the earbuds. Excludes case recharges. ANC, codec, connection, volume and tested edition belong in the row or source note.

Not available

Not available

Longest tested use per chargeiHighest earbuds-only duration among stored reviewer tests. Modes and settings may differ between tests and products.

Not available

Not available

Battery life with case (measured)iReviewer-tested total including earbuds and case recharges. Do not calculate this by multiplying one-charge runtime by claimed recharge count.

Not available

Not available

Full charge time (measured)iBuds in the case, 0 to 100 %. Measured by a reviewer

Not available

Not available

Weight per bud (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Microphones and calls

4 of 7 differ

Voice microphones in both earbudsiPhysical call and beamforming microphones across the pair. Excludes case microphones and vibration sensors. Shared ANC microphones can also count here when used for calls.

01Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Tech specs: No microphone, designed for sleep only. FAQ: there is no microphone in the Sleepbuds to support phone calls.

Not available

All microphones in both earbudsiEvery physical microphone across the pair, including call and ANC microphones. Shared microphones count once. Excludes the charging case and voice vibration sensors.

01Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026No microphone in the earbuds. The Smart Case has a microphone that only measures room noise. The case is excluded from this count.

Not available

Bone conduction voice sensoriA dedicated bone or jaw conduction sensor for detecting speech vibrations. A microphone or speech-detecting accelerometer alone does not prove this architecture.

Not available

Not available

Mic noise reduction

Not available

AI1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Clear Voice Smart Mic. The help page says it uses artificial intelligence to isolate the speaker's voice.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Clear Voice Smart Mic section: artificial intelligence isolates the speaker's voice and reduces background noise.

Call audio bandwidthiHighest supported call-audio bandwidth. Compatible phone, operating system, call app or network requirements belong in the source note.

Not available

Not available

Mic mute controliAn earbud control that mutes the microphone during calls. Includes touch or pressure gestures and physical buttons. Phone/app-only controls do not qualify.

Not available

Not available

SidetoneiHear your own voice in calls

Not available

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Natural Voice Sidetone for Calls.

Connectivity

5 of 18 differ

Chip

Not available

Not available

Connections

Bluetooth1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Bluetooth only. The Smart Case connects to the phone over Bluetooth Classic.

Bluetooth1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list and specs: Bluetooth 5.3 only.

Bluetooth

5.31Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Connection section: Bluetooth 5.3 radios.

5.31Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Connection Type Bluetooth 5.3. The page does not list codecs.

Bluetooth codecs

Not available

Not available

Bluetooth profiles

A2DP1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Connectivity: Bluetooth 5.3 (A2DP + Low Energy Audio). Only A2DP is named as an audio profile.

Not available

LE Audio

Yes1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Connectivity: Bluetooth 5.3 radios supporting A2DP and Low Energy Audio (LEA) enabled streaming. No independent test of LE Audio was found.

Not available

Auracast

Not available

Not available

MultipointiConcurrent Bluetooth connections to multiple source devices. Pairing memory and switching through a manufacturer account alone do not qualify.

No5Reviewsoundguys.com/ozlo-sleepbuds-2-review-161143Read 15 October 2026Review cons: no Bluetooth multipoint. The buds can only connect to one device at a time. Firmware 02.11.2606011.

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Multipoint Pairing.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Multipoint Pairing section: pair with two devices at once, but they do not play simultaneously.10Reviewsoundguys.com/skullcandy-method-540-anc-gets-skull-ai-151116Read 15 October 2026News article: Bluetooth multipoint.

Multipoint devicesiMaximum source devices concurrently connected by Bluetooth, not the number remembered in pairing history.

Not available

26Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Multipoint Pairing section: two devices at once. The earbuds reconnect to the two most recently paired devices.

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

Not available

Paired devices rememberediMaximum remembered Bluetooth source pairings. This is separate from simultaneous multipoint connections.

Not available

Not available

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Not available

Google Fast Pair1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Google Fast Pair.10Reviewsoundguys.com/skullcandy-method-540-anc-gets-skull-ai-151116Read 15 October 2026News article: Bluetooth 5.3, Google Fast Pair and Bluetooth multipoint.

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

Not available

Not available

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

Simultaneous 2.4 GHz and Bluetooth audioiBoth connection types can play audio together. Quick switching between independent modes does not qualify.

Not available

Not available

Latency

1 of 3 differ

Low latency mode

Not available

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Skullcandy help page lists Low-Latency Mode in the app. The product page does not.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026App list: turn on Low-Latency Mode to improve performance for gaming or streaming video. TechRadar also lists it.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: the app can turn on low-latency mode.

Claimed latency

Not available

Not available

Lowest claimed latency

Not available

Not available

Compatibility

2 of 4 differ

PlatformsiPlatforms with documented audio support. App availability and advanced features can be more limited. Edition-specific support is listed in variants.

Android, iOS1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026The page lists streaming from any Bluetooth source and the Ozlo Sleep app for iOS and Android.

Not available

Connection per platformiDocumented audio connection for each platform. USB-C phone routes require a compatible port. Platform edition and microphone restrictions belong in source notes or feature requirements.

Not available

Not available

Features that need a specific deviceiDevice, operating system, firmware, codec, content, account or region requirements for a named feature.

AOzlo Sleepbuds 2

Feature	Needs
Setup and audio streaming	A phone and an active Bluetooth connection are needed to set up the earbuds and to stream audio. The earbuds connect to the Smart Case and the Smart Case connects to the phone.
Ozlo Sleep app	Android 12 or later. The product page says iOS 17 or later on iPhone and iPad. The help center says iOS 18 or later on iPhone and iPad.
Phone-free Sleep Sound	The earbuds can start the built-in Sleep Sound when taken out of the case, with no phone or Bluetooth connection. This is set up in the app.
In-ear alarm	Set in the Ozlo app. It works without a phone connection and in Bluetooth Disabled mode.
Battery test	Ozlo test with streaming audio and Sleep Sounds at 50 percent volume.

Source1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026FAQ and System Requirements sections.10Maker product pageozlo-sleepbuds-2.gorgias.help/en-US/what-are-the-app-requirements-7597631Read 21 October 2026Help center, What are the app requirements: iOS 18 or later on iPhone and iPad, Android 12 or later on phones. The product page FAQ says iOS 17 or later. Both are kept in the requirement text, since the maker documents disagree. The App Content and Sound Library Specs article says iOS 18 or later and Android 12 or later.

BSkullcandy Method 540 ANC

Feature	Needs
Skull AI	Needs the Skull-iQ app. It is free for a limited time and then a monthly or yearly subscription.
Spotify Tap	Needs the Spotify app on the phone and an active Spotify account.
Multipoint	Two devices stay connected but they do not play audio at the same time. Turn multipoint off in the app before a firmware update.
Skullcandy app	Supported on mobile devices only. There is no app support on PC, iPad or MacBook.

Source6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Multipoint, Spotify Tap, firmware update and new features sections.

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

Battery per budiBattery cell capacity of one earbud. The source note states typical or rated capacity. Charging input current is not capacity.

Not available

Not available

User-replaceable earbud batteryiThe maker documents normal battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

Not available

Not available

Claimed battery lifeiManufacturer maximum runtime under the stated mode, codec and spatial processing state. Name the spatial or immersive processing mode and other conditions in source notes. Omit unspecified settings. with_case false means one charge of the earbuds. true means earbuds plus case recharges.

AOzlo Sleepbuds 2

Mode	Includes case recharges	Hours (h)
ANC off	No	14

Source1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Up to 14 hours on a single charge. Footnote: Ozlo testing with Sleepbuds 2 playing streaming audio and Sleep Sounds at 50 percent volume. Results with other audio, volume, Bluetooth use and features vary. No codec is named. The case claim is stored as charging guidance because the maker gives only a number of recharges.

BSkullcandy Method 540 ANC

Mode	Includes case recharges	Hours (h)
ANC on	No	9
ANC on	Yes	32
ANC off	No	11
ANC off	Yes	40

Source1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list and FAQ: ANC on 9 hours in the earbuds and 23 hours in the case, 32 hours total. ANC off 11 hours in the earbuds and 29 hours in the case, 40 hours total. Volume and codec are not stated. The maker blog gives 42 hours with ANC off and the help page says up to 30 hours with ANC on. The product page figures are stored.

Longest claimed use per chargeiHighest earbuds-only runtime among all stored modes. This can be ANC off, Hearing Aid, heart-rate or call use. Read the battery table and source conditions.

14h=CalculatedFrom Claimed battery life

11h=CalculatedFrom Claimed battery life

Playback per charge with ANC (claimed)iHighest claimed earbuds-only playback with ANC enabled. Codec and spatial-audio conditions belong in the source note.

Not available

9h=CalculatedFrom Claimed battery life

Playback per charge without ANC (claimed)iHighest claimed earbuds-only playback with ANC disabled. Codec and volume conditions belong in the source note.

14h=CalculatedFrom Claimed battery life

11h=CalculatedFrom Claimed battery life

Total with case (claimed)iHighest claimed runtime including the initial earbud charge and all case recharges. It is not the case recharge runtime alone.

Not available

40h=CalculatedFrom Claimed battery life

Total with case and ANC (claimed)iClaimed total playback with ANC, including the initial earbud charge and case recharges.

Not available

32h=CalculatedFrom Claimed battery life

Talk time (claimed)

Not available

Not available

Full charge time, budsiTime to charge discharged earbuds to full in the case. Excludes charging the case itself or a combined buds-and-case result.

180min9Maker product pageozlo-sleepbuds-2.gorgias.help/en-US/battery-and-charging-specs-7597612Read 21 October 2026Ozlo Sleepbuds 2 help center, Battery & Charging Specs: Sleepbuds full charge approximately 3 hours. The article How long do Sleepbuds 2 take to charge gives the same figure. The Sleepbuds charge only in the Smart Case. Maker estimate, not a measurement.

Not available

Charging guidanceiPublished charging guidance or estimates that do not separate earbuds and case. Preserve the maker’s component scope and limits. Do not assign an unspecified or combined estimate to a component-specific numeric field.

The Smart Case holds an additional 2 to 3 charges for the earbuds. The maker gives no total runtime with the case.1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Battery section: the Smart Case holds an additional 2-3 charges. SoundGuys measured roughly three to four recharges.5Reviewsoundguys.com/ozlo-sleepbuds-2-review-161143Read 15 October 2026Review: after streaming for eight hours about 30 percent was left, and the case adds roughly three to four full recharges.

Not available

Quick charge timeiCharge duration corresponding to quick_charge_playback_h. Source note states earbuds-only or case-inclusive charging and playback settings.

Not available

10min1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Rapid Charge, 10 minutes gives 2 hours.

Earbud playback after quick chargeiEarbuds-only runtime after quick_charge_min of charging. A claimed case-inclusive total does not qualify. ANC, codec and volume conditions belong in the source note.

Not available

2h1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026FAQ: the earbuds get 2 hours of battery after 10 minutes in their case. This is earbuds-only playback. ANC and volume are not stated.

Charging case

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Case batteryiCharging-case battery cell capacity. The source note distinguishes typical, rated and output capacity. USB output capacity alone does not qualify.

Not available

Not available

User-replaceable case batteryiThe maker documents normal case battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

Not available

Not available

Case charging port

USB-C1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Charges via USB-C. The charging cable is in the box.

USB-C6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Charging section: the case charges from a power source with the USB-C charging cable and has a single LED next to the USB-C port.

Case full charge timeiBy cable, 0 to 100 %. A time the maker gives with the earbuds inside the case counts, and the source note says so.

150min9Maker product pageozlo-sleepbuds-2.gorgias.help/en-US/battery-and-charging-specs-7597612Read 21 October 2026Same article: Smart Case full charge about 2.5 hours under normal conditions, by USB-C. The user guide pages written for the original Sleepbuds say up to 8 hours with the Sleepbuds outside the case, so the Sleepbuds 2 help center figure is used.

Not available

Wireless charging

No1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026FAQ: Does the Smart Case support wireless charging? No.5Reviewsoundguys.com/ozlo-sleepbuds-2-review-161143Read 15 October 2026Review cons: the case charges over USB-C only and has no wireless charging.

Not available

Wireless standardsiDocumented case charging standards or supported chargers. Magnetic alignment alone does not establish Qi2 certification.

Not available

Not available

Wireless charging poweriHighest wireless charging input the maker states for the case. The output of a charging pad does not count.

Not available

Not available

Speaker in caseiAn audio speaker physically in the charging case, for locating or status sounds. A microphone in the case is separate.

Not available

Not available

Screen on case

Not available

Not available

Case works as audio transmitteriCase relays external source audio through USB or an analog audio input. A case microphone for recording or calls does not qualify.

Not available

Not available

Controls

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ControlsiPressure is a force sensor that does not move, such as a stem you squeeze. Button is a key that moves when pressed.

Not available

Touch6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Quick start default controls use taps and a 1 second hold on either bud. TechRadar says the controls are touch. The help page also calls the control a Main Function Button.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: each bud has touch controls if you tap on its body.

Earbud volume controliHow earbud controls adjust volume, including a voice command if supported. Phone or app controls alone do not qualify.

None4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Review, App and controls: in the app you can select the soundscape, set the in-ear alarm, adjust the volume or change the Sleep Mode. No earbud controls are described.11Maker product pageozlo-sleepbuds-2.gorgias.help/en-US/what-are-the-specific-differences-between-the-original-sleepbuds-and-sleepbuds-2-7597351Read 21 October 2026Help center comparison table, Phone-Free Controls: the original Sleepbuds need the Ozlo app. Sleepbuds 2 add a multifunction button on the Smart Case for pairing and playback control. No control on the earbuds is documented, and the maker hardware overview lists none. Volume is set in the Ozlo app. The Smart Case button has no volume function.

Touch6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Customize button functions lists volume up and volume down as options. They are not default gestures.

Gestures

Not available

Single tap: play or pause, answer a call, Double tap: next track, Triple tap: switch between ANC on, Stay-Aware mode and ANC off, Hold for 1 second: end a call, reject an incoming call, or launch Spotify, Hold for 3 seconds: start pairing mode for a second device6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Quick start default user controls. The page text is flattened, so the mapping of actions to gestures follows its order. A 3 second hold on either bud starts pairing mode in the multipoint steps.

Remappable controls

Not available

Yes1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: Customize Button Functions.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Customize button functions: single, double, triple tap and 1 second hold on both buds can be set in the app. Not every function can be changed.

Voice assistant

Not available

Skull AI1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Page: Skull AI voice assistant, activated with OK, Skully.6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026FAQ: Skull AI Beta, OK Skully. Free for a limited time and then paid.

Sensors and health

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In-ear detection

Not available

Not available

Sensors

Sleep-detecting accelerometer in the earbuds, Ambient noise detection in the Smart Case, Ambient temperature sensor in the Smart Case, Ambient light sensor in the Smart Case1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Sensors section: Smart Case button, ambient noise detection, ambient temperature sensor and ambient light sensor. Sleepbuds: sleep-detecting accelerometer.

Not available

Heart rate sensor

Not available

Not available

Skin temperature sensingiA documented skin temperature sensor. This is separate from the operating temperature range or a heart-rate sensor.

Not available

Not available

Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

Not available

Medical clearances

Not available

Not available

Hearing testiA documented hearing assessment feature, including consumer sound-personalization tests. Medical diagnostic clearance must be stated separately.

Not available

Not available

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Sleep tracking with Sleep Patterns, Room noise, light and temperature tracking in the Smart Case1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Sleep Patterns tracking in the Ozlo Sleep app, with environment insights from the Smart Case sensors.

Not available

Fit and durability

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Ear tips includediTip sizes supplied with the product, including the pair fitted to the earbuds. Do not list separately sold sizes as included.

0 (extra small), 1 (small), 2 (medium), 3 (large)1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026In the box: 4 sizes of soft silicone tips. Size names are in the hardware overview guide and the Tom's Guide review.4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Review: wing tip sizes range from 0 (smallest) to 3 (biggest), size 2 pre-loaded.6Owner's manualozlosleep.com/blogs/user-guide/hardware-overviewRead 15 October 2026Sleepbuds hardware overview guide (dated 4 August 2026): 4 different size silicone tips numbered 0 extra small, 1 small, 2 medium and 3 large. The guide is written for the Ozlo Sleepbuds family and Tom's Guide confirms sizes 0 to 3 for the Sleepbuds 2.

S, M, L1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026What's in the box: Ear Gel sizes S, M, L.10Reviewsoundguys.com/skullcandy-method-540-anc-gets-skull-ai-151116Read 15 October 2026News article, 12 January 2026: three pairs of ear tips.

Ear tip materials

Silicone1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Soft silicone tips.

Not available

StabilisersiPhysical stabilizing fittings or structures. Stability bands are separate from fins, wings and ear hooks.

Wing tips4Reviewtomsguide.com/wellness/sleep-tech/ozlo-sleepbuds-2Read 15 October 2026Review: custom-fit soft silicone wingtips act as an anchor. Sizes run from 0 to 3, with size 2 fitted.

Fins1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026What's in the box: Fit Fin sizes S, M, L.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: fins wedge the buds into the ear.

Ear tip fit test

Not available

Not available

Dust and water rating, buds

IPX41Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Sleepbuds offer protection against dust, sweat and light rain (IPX4). No dust rating is given, so the rating is IPX4.

IPX41Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Feature list: IPX4 Sweat and Water Resistant. No rating is stated for the case.

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

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Companion app

Ozlo Sleep app1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Ozlo Sleep App, iOS and Android.

Skull-iQ1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026FAQ: download the Skull-iQ app. The app store listing is named Skullcandy.

App platforms

Android, iOS1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Ozlo Sleep App for iOS and Android. Android 12 or later, iOS 17 or later.

Android, iOS6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026The Skullcandy app is supported on mobile devices only. The US page links the iOS and Google Play app stores.

User firmware updates

Yes13Maker product pageozlosleep.com/blogs/release-notes/tagged/sleepbudsRead 21 October 2026Release notes list Sleepbuds 2 firmware 02.11.2606025 for the Smart Case, both earbuds and the Bluetooth module, with an Update with Web App button. The iOS app note mentions faster firmware update downloads. The Ozlo site also links a Sleepbuds Updater.

Yes6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Firmware over the air updates through the Skullcandy app.

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Not available

Dimensions and weight

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Weight per budiMass of one earbud. Tip size and approximate values belong in the source note. Do not store pair or case-inclusive mass.

1.6g(0.1 oz)1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Tech specifications: 0.06 oz (1.6 g each), without the silicone tip.

11g(0.4 oz)1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Weight Buds 11g each.

Bud dimensionsiDimensions of one earbud on the explicitly identified width, height and depth axes. An unlabeled tuple cannot establish those axes.

Width17Height11Depth12mm(0.7 × 0.4 × 0.5 in)1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Tech specifications, earbuds without silicone tip: height 11 mm, width 17 mm, depth 12 mm. Axes are labelled by the maker.

Not available

Case weightiCharging case mass excluding earbuds. Case-inclusive product mass does not qualify unless the source explicitly gives the empty-case figure.

96g(3.4 oz)1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Smart Case without Sleepbuds inside: 3.5 oz (96 g).

72g(2.5 oz)1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Technical Specifications: Case 72g.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: charging case 72g.

Case dimensionsiCharging-case width, height and depth on explicitly identified source axes. Report conflicting axis labels rather than reorder a tuple by appearance.

Width78Height78Depth27mm(3.1 × 3.1 × 1.1 in)1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Smart Case: height 78 mm, width 78 mm, depth 27 mm. Axes are labelled by the maker.

Width36Height102Depth29mm(1.4 × 4 × 1.1 in)1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Product gallery drawing with front and side views: 1.4 in (3.6 cm) wide, 1.1 in (2.9 cm) deep and 4 in (10.2 cm) high. Converted exactly to mm. The height excludes the clip ring. TechRadar gives 3.6 x 2.9 x 10.2 cm for the case.9Reviewtechradar.com/audio/earbuds-airpods/skullcandy-method-540-reviewRead 15 October 2026Review: the case measures 3.6 x 2.9 x 10.2 cm. The axes are not labelled in the text, so the product gallery drawing sets them.

Certifications

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Hi-Res AudioiThe Japan Audio Society logos. Hi-Res Audio Wireless is also written Hi-Res Wireless Audio.

Not available

Not available

Communication certifications

Not available

Not available

FCC IDs

2BAGA010021L, 2BAGA01002114Regulatory filingfccid.io/2BAGA010021LRead 21 October 2026FCC grant 2BAGA010021L for the Sleepbuds earbuds, model 010021L, applicant Drowsy Digital Inc (the company named in the Ozlo site copyright), granted 2026-05-22. Product code 010021 matches the Sleepbuds 2 SKU 010021C01WW01. The first generation grant is 2BAGA010011L. The case grant 2BAGA010021 is the second entry.15Regulatory filingfccid.io/2BAGA010021Read 21 October 2026FCC grant 2BAGA010021 for the Charging Case, model 010021, applicant Drowsy Digital Inc, granted 2026-05-22. The SAR report lists a 75 x 75 x 25 mm case body. The maker states 78 x 78 x 27 mm.

Not available

Other certifications

Not available

Not available

In the box

2 of 2 differ

In the box

Sleepbuds 2 earbuds, Smart Case (charging and storage case), 4 sizes of soft silicone tips, Charging cable, Quick Start Guide1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026Included in the box: Ozlo Sleepbuds, charging and storage case, 4 sizes of soft silicone tips, charging cable.12Owner's manualozlosleep.com/blogs/blogs/sleepbuds-2-guideRead 21 October 2026Section 1 Unboxing: Sleepbuds 2, Smart Charging Case, USB-C charging cable, four sizes of silicone ear tips and Quick Start Guide.

Method 540 ANC True Wireless Earbuds, Charging Case, Ear Gel sizes: S, M, L, Fit Fin sizes: S, M, L, User Guide1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026What's in the box list. The list shows no cable. The help page mentions an included USB-C charging cable.

Cables included

AOzlo Sleepbuds 2

Type	Count
USB-C	1

Source12Owner's manualozlosleep.com/blogs/blogs/sleepbuds-2-guideRead 21 October 2026Section 1 Unboxing: one USB-C charging cable. No length or other connector is stated.

BSkullcandy Method 540 ANC

Type	Count
USB-C charging cable	1

Source6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Charging section: the included USB-C charging cable. The product page box list does not show a cable.

Links

Not compared

Product page

ozlosleep.com/products/sleepbuds1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026

www.skullcandy.com/products/method-540-anc-noise-canceling-earbuds1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026

Spec sheet

Not available

Not available

Manual

ozlosleep.com/blogs/blogs/sleepbuds-2-guide12Owner's manualozlosleep.com/blogs/blogs/sleepbuds-2-guideRead 21 October 2026Ozlo Complete Guide for Sleepbuds 2: unboxing, setup, Smart Case button, sleep modes and care. No PDF manual was found.

www.skullcandy.com/blogs/product-help/method-540-anc6Owner's manualskullcandy.com/blogs/product-help/method-540-ancRead 15 October 2026Maker product help page for the Method 540 ANC with setup, controls, app and charging. It is the online guide. No PDF user guide was found.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

0 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year1Maker product pageozlosleep.com/products/sleepbudsRead 15 October 2026FAQ: Ozlo Sleepbuds come with a 1-year warranty. In the EU and UK, that is extended to two years. The US term is stored.

1year1Maker product pageskullcandy.com/products/method-540-anc-noise-canceling-earbudsRead 15 October 2026Store page: 1-Year Limited Warranty. US market.

Both are also in the API. Back to all earbuds.