Wireless speakers / Compare

Bose SoundLink Flex Portable Speaker (2nd Gen) vs Ultimate Ears EVERBOOM

A

Product A: Bose

SoundLink Flex Portable Speaker (2nd Gen)

47 of 96 known

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B

Product B: Ultimate Ears

EVERBOOM

53 of 96 known

Change Ultimate Ears EVERBOOM

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All 96 fields

Every value links to where we found it.

Only differences

ABose SoundLink Flex Portable Speaker (2nd Gen)

BUltimate Ears EVERBOOM

General

5 of 8 differ

Series

SoundLink1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

BOOM1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026The speaker sits in the Ultimate Ears BOOM family. The page names BOOM 3, MEGABOOM 3, HYPERBOOM and EPICBOOM as speakers that pair with it.

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

4425913Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Regulatory information, page 4: Model 442591.

SR0195, 984-001872, 984-001923, 984-001873, 984-001924, 984-001920, 984-001925, 984-001930, 984-0019351Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026US store JSON-LD: SKU and MPN 984-001872 for Charcoal Black and 984-001923 for Azure Blue. The UK, German and EU store pages list 984-001873 and 984-001924. The Logitech Australia page lists 984-001920, 984-001925, 984-001930 and 984-001935. SR0195 is the model number on the speaker label per the Logitech specification article.2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Product information table: speaker model number SR0195 on the label on the bottom cap.12Maker product pagelogitech.com/en-gb/products/speakers/bluetooth-speakers/everboom-bluetooth.htmlRead 15 October 2026UK page: Charcoal Black 984-001873 and Azure Blue 984-001924. The UK, German and EU store pages carry the same two SKUs.13Maker product pagelogitech.com/en-au/products/speakers/bluetooth-speakers/everboom-bluetooth.htmlRead 15 October 2026Australia page structured data: 984-001920, 984-001925, 984-001930 and 984-001935.

GTIN / EAN

Not available

09785519174814Retailer pagemedia.jaycar.com.au/product/resources/XC8250_datasheetMain_155514.pdfRead 15 October 2026Distributor datasheet for part 984-001920 (Black): bar code 097855191748. The other colours have no bar code stored.

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

Not available

26 June 20244Press releasesilicon.co.uk/press-release/the-rugged-ultimate-ears-everboom-superior-sound-that-is-waterproof-dustproof-and-floatableRead 15 October 2026Logitech press release of 26 June 2024, republished by Silicon UK.

Status

Available1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Available1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026US store page shows Add to cart and In stock in October 2026. The US price there is $179.99, which is not the launch price.

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

Bose SoundLink Flex Bluetooth Speaker5Reviewsoundguys.com/bose-soundlink-flex-2nd-gen-review-125253Read 8 October 2026SoundGuys calls the original Bose SoundLink Flex the predecessor of the SoundLink Flex (2nd Gen).

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.

Not available

$249.994Press releasesilicon.co.uk/press-release/the-rugged-ultimate-ears-everboom-superior-sound-that-is-waterproof-dustproof-and-floatableRead 15 October 2026MSRP $249.99 USD. The release says pricing and availability may vary by region.5Reviewtechradar.com/audio/wireless-bluetooth-speakers/ultimate-ears-everboom-reviewRead 15 October 2026Launch price $249.99 / 249.99 GBP / AU$349.6Reviewsoundguys.com/ultimate-ears-everboom-review-119681Read 15 October 2026MSRP $249.99.

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

€269.9910Press articlestadt-bremerhaven.de/ultimate-ears-everboom-plus-boom-4-wonderboom-4-und-megaboom-4-vorgestelltRead 15 October 2026German launch report with a price update: Everboom 269,99 Euro. hifi.de gives the same 269,99 Euro and appgefahren.de rounds it to 270 Euro. Price includes VAT. No Ultimate Ears or Logitech German price page from 2024 was found.11Press articlehifi.de/news/ultimate-ears-frischt-speaker-katalog-auf-neuer-bluetooth-lautsprecher-everboom-upgrades-fuer-wonderboom-und-co-196915Read 15 October 2026Launch article of 26 June 2024 lists 269,99 Euro for the Everboom (Amazon listing of the blue version).

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

US1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

US1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026

ColoursiThe maker's own colour names

Black, Blue Dusk, Sandstone, Alpine Sage, Twilight Blue, Petal Pink, Citrus Yellow, Fog Grey, Dewdrop Mint1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Current maker page explicitly offers Dewdrop Mint. Other listed colors come from the exact-model support specification.2Maker product pagesupport.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026

Charcoal Black, Azure Blue, Raspberry Red, Enchanting Lilac1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026US page: Charcoal Black and Azure Blue. The Logitech Australia page also lists Raspberry Red and Enchanting Lilac. Colour availability differs per region.12Maker product pagelogitech.com/en-gb/products/speakers/bluetooth-speakers/everboom-bluetooth.htmlRead 15 October 2026Charcoal Black and Azure Blue.13Maker product pagelogitech.com/en-au/products/speakers/bluetooth-speakers/everboom-bluetooth.htmlRead 15 October 2026Charcoal Black, Azure Blue, Raspberry Red and Enchanting Lilac.

Speaker typeiHome covers speakers made to stay in one place, including smart speakers. A speaker with Wi-Fi or a voice assistant can be of any type.

Portable1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Portable1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Maker markets a portable, waterproof, floatable speaker with a carabiner.

Audio

10 of 18 differ

Audio channelsiSound channels reproduced by one speaker. Pairing two speakers for stereo is separate.

Mono1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Stereo9Reviewrtings.com/speaker/reviews/ultimate-ears/everboomRead 15 October 2026Public pros list: excellent directivity, with stereo playback. This describes the single speaker.

Audio driversiPowered audio transducers in one speaker. Passive radiators are counted separately. Circular diameter and rectangular width and height have separate columns. Per-driver power must state continuous or RMS basis and battery or mains operation in the source note.

ABose SoundLink Flex Portable Speaker (2nd Gen)

Driver type	Count
Full-range	1

Source4Maker product pagesupport.bose.com/article/poor-sound-quality-from-product-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026Exact second-generation support article: one active speaker and two passive radiators. Full-range role is also stated in product-page sound options.

BUltimate Ears EVERBOOM

Driver type	Count	Width (mm)	Height (mm)
Active full range transducer	2	56.6	56.2

Source1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Product tech specs: two 56.6 x 56.2 mm active full range transducers. Width and height are the two published axes. The maker does not name the shape. The Logitech specification article rounds to 56 x 56 mm. No driver power rating is published.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

24Maker product pagesupport.bose.com/article/poor-sound-quality-from-product-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026

21Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Product tech specs: two 49.4 x 87 mm passive radiators.

Rated audio poweriMaker-published total rated continuous audio output. Battery power is used for portable speakers when mains and battery ratings differ. Peak marketing power is separate.

Not available

Not available

Rated audio power on mainsiTotal rated continuous audio output with external power. Store a separate battery rating when the maker publishes both.

Not available

Not available

Audio output power (unspecified rating)iMaker- or reviewer-published audio output power whose continuous or peak rating basis is not stated. This is separate from rated continuous output and explicitly published peak output.

Not available

Not available

Peak audio poweriExplicitly published peak audio output. Never substitute for rated continuous output.

Not available

Not available

Frequency response lower limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

Not available

70Hz2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Frequency Response 70-20kHz (-3dB). Test mode is not stated.

Frequency response upper limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

Not available

20kHz2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Frequency Response 70-20kHz (-3dB). Test mode is not stated.

Signal-to-noise ratio (claimed)

Not available

Not available

Adjustable equalizeriUser-adjustable frequency bands. Selecting fixed sound presets alone does not qualify.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Page: customizable EQ with a customized tuner in the BOOM app.3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026Customize the EQ in the app. One custom EQ can be named and saved.

Equalizer bandsiNumber of user-adjustable frequency bands. Do not count sound presets.

35Reviewsoundguys.com/bose-soundlink-flex-2nd-gen-review-125253Read 8 October 2026Bose app offers Bass, Middle and Treble sliders.

56Reviewsoundguys.com/ultimate-ears-everboom-review-119681Read 15 October 2026Review: the UE | BOOM app offers a 5-band customizable EQ. Firmware 1.0.19 and app V7.17.154 were tested.7Reviewmacrumors.com/review/ultimate-ears-everboom-speakerRead 15 October 2026Review: presets can be customized via five sliders spanning the frequencies.

Automatic sound adjustmentiAdjusts audio to placement or playback conditions. Keep the named feature and conditions in the source note.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026PositionIQ senses speaker orientation and adjusts playback. Standing, lying and hanging orientations are supported.

Not available

Sound modesiNamed playback modes. Battery extension modes are also qualified in battery source notes.

Not available

Outdoor Boost1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Outdoor Boost button adds about 1 dB of sound for outdoor use. The page says four EQ presets but names only three and joins two names without a comma. MacRumors and What's The Best name different presets, so the EQ presets are not stored.

Wireless stereo pairingiTwo compatible speakers can play separate left and right channels.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Two identical SoundLink Flex (2nd Gen) speakers provide left and right channels. Party Mode can link different compatible current SoundLink models.

Not available

Speaker link protocolsiNamed systems for linking compatible speakers, such as PartyBoost, Auracast or Party Connect. Linking support does not establish compatibility across all models.

Bose Party Mode, Bose Stereo Mode, Bose SimpleSync1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

PartyUp1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Page: pair EVERBOOM with other Ultimate Ears speakers such as BOOM 3, MEGABOOM 3, HYPERBOOM and EPICBOOM. The getting started article names the feature PartyUp.3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026Section PartyUp lists the speakers that can join, including EVERBOOM.

Max linked speakersiPublished maximum in a speaker group. A stereo pair is recorded separately. A figure such as 100+ is stored as 100.

21Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Two speakers in Party or Stereo Mode. SimpleSync connects to a compatible Bose smart speaker or soundbar.

1503Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026UE | BOOM app section: PartyUp pairs up to 150 speakers. Compatible are BOOM, MEGABOOM, EPICBOOM and HYPERBOOM families, and every speaker needs the latest firmware. Linking is app based, so the Bluetooth group field is not set.

Max Bluetooth group speakersiPublished maximum speakers in one Bluetooth playback group, including the first speaker. Source notes name the compatible models or families, linking system and firmware requirements. Wi-Fi groups and concurrent Bluetooth source devices are excluded. A stereo pair alone does not establish the maximum when other Bluetooth linking systems are supported. A figure such as 100+ is stored as 100.

Not available

Not available

Connectivity

7 of 16 differ

Bluetooth audio playbackiPlays audio streamed over Bluetooth from a phone or other source. Bluetooth used only for setup or app control does not count.

Yes3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026

Bluetooth versioniVersion of the Bluetooth radio. Some Wi-Fi speakers use Bluetooth only for setup. See Bluetooth audio playback.

5.32Maker product pagesupport.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026

5.12Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026General specifications: Bluetooth 5.1. TechRadar and What Hi-Fi both write Bluetooth 5.3 and the maker article is stored.

Bluetooth codecsiExplicitly supported receive codecs. Bluetooth version alone does not establish codecs.

SBC, AAC, aptX Adaptive3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Page 18 explicitly identifies aptX Adaptive with a compatible Snapdragon Sound source. SBC and AAC are corroborated by the exact-model SoundGuys review.

Not available

Bluetooth profiles

A2DP, AVRCP, BLE, HFP2Maker product pagesupport.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026

A2DP1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Tech specs, for audio playback: devices that support Bluetooth A2DP.

Bluetooth LE AudioiExplicit LE Audio support. Bluetooth LE for app control alone does not qualify.

Not available

Not available

AuracastiExplicit Auracast support. Sending, receiving and speaker-group roles belong in source notes.

Not available

Not available

MultipointiConcurrent Bluetooth source connections. Pairing memory and speaker-to-speaker linking do not qualify.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

No9Reviewrtings.com/speaker/reviews/ultimate-ears/everboomRead 15 October 2026Public cons list: no Bluetooth multi-device connectivity. The maker getting started article only describes a memory of eight previously paired devices.

Multipoint source devicesiMaximum concurrently connected Bluetooth source devices, not remembered pairings.

21Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Not available

Bluetooth range (claimed)iMaker-claimed Bluetooth range to the source device. Test conditions belong in the source note.

Not available

55m1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Mobile range of play up to 55 m. Actual range varies with use, settings, environment and number of connected devices.

Wi-FiiBuilt-in Wi-Fi, for audio streaming, setup or control.

No6Reviewrtings.com/speaker/reviews/bose/soundlink-flex-2nd-genRead 8 October 2026Public Wi-Fi test row explicitly says No. Member-only metrics were not used.

No5Reviewtechradar.com/audio/wireless-bluetooth-speakers/ultimate-ears-everboom-reviewRead 15 October 2026The review says the speaker lacks Wi-Fi connectivity.8Reviewwhathifi.com/ultimate-ears/700/reviewRead 15 October 2026Review: Wi-Fi and voice commands are not on board.9Reviewrtings.com/speaker/reviews/ultimate-ears/everboomRead 15 October 2026Public headline row: Wi-Fi No.

Wi-Fi standardsiOne 802.11 name per item, such as 802.11ax. A Wi-Fi generation is written as its standard, so Wi-Fi 5 is 802.11ac and Wi-Fi 6 is 802.11ax. Older standards are listed only when a source names them.

Not available

Not available

Network audio protocolsiNamed systems that stream audio to the speaker over the home network. AirPlay is written as AirPlay 2. Chromecast built-in is written as Google Cast. Other names follow the maker, such as Spotify Connect.

Not available

Not available

USB audio inputiPlayback from a connected computer or phone through USB. Charging, service ports and USB flash-drive playback do not qualify.

Not available

Not available

USB drive playbackiPlayback of audio files on a connected USB storage device.

Not available

Not available

USB audio file formats

Not available

Not available

PortsiPhysical speaker connectors. Record charging, audio input, power output and service roles separately. A shared microphone and guitar jack is one port. A combo jack that takes XLR and 6.35 mm plugs is 6.35 mm audio, and the role names XLR. Optical is a TOSLINK digital audio socket.

ABose SoundLink Flex Portable Speaker (2nd Gen)

Not available

BUltimate Ears EVERBOOM

Connector	Count	Role
USB-C	1	Charging input under a weather door

Source2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Charging by USB-C cable. The getting started article says to lift the weather door to reach the Type-C port.

Controls and software

5 of 8 differ

SpeakerphoneiBuilt-in microphone and call support, through a connected phone or a voice assistant's calling. A microphone used only for voice commands does not count. Microphone inputs for karaoke are separate.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Standard non-SE SoundLink Flex (2nd Gen). Maker specifications exclude the later SE variant from microphone support. No SE variant is included.

No2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Speaker specifications: microphone None. The MEGAPHONE feature uses the phone microphone.

Voice assistantsiVoice assistants explicitly usable through the speaker, such as Amazon Alexa, Google Assistant, Siri or Sonos Voice Control. State whether a connected phone is required.

Siri, Google Assistant6Reviewrtings.com/speaker/reviews/bose/soundlink-flex-2nd-genRead 8 October 2026Public Voice Assistant verdict explicitly supports the paired phone Siri or Google Assistant. No independent assistant on the speaker.

Not available

Controls

Power, Bluetooth pairing, Volume up/down, Play/pause, Next/previous track, Programmable shortcut3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Speaker Controls pages 19-23. Shortcut choices include linking, Spotify Tap or connected-phone voice assistant.

Power, Bluetooth pairing, Volume up/down, Magic Button (play/pause, skip, previous track, preset playlist), Outdoor Boost, Battery level (press volume up and down together)2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Speaker +/- button, app and mobile. Short press for play or pause, double click for next track, triple click to rewind, long press for the Magic Button preset playlist. Outdoor mode by button or app.3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026Hold the power button to turn on. Press and hold the Bluetooth button to pair. Plus and minus set volume and pressing both shows the battery level. Magic Button and Outdoor Boost button as listed.

Companion app

Bose app1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

UE | BOOM2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Apps available at release: UE | BOOM.3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026The UE | BOOM app by Ultimate Ears.

App platforms

iOS, Android1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

iOS, Android2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026System requirements: iOS / Android.3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026iOS App Store and Google Play Store.

User firmware updates

Yes3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Care and Maintenance, Update the Speaker: Bose app OTA or Bose updater website.

Yes3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026Speaker Updates and PartyUp sections: speaker software updates over the air through the UE | BOOM app.

Built-in lightingiDecorative or ambient lighting. Status, battery, connection and microphone indicator LEDs alone do not qualify.

Not available

No2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Indicator lights: six LEDs (power, Bluetooth, Outdoor on the top panel and three battery LEDs on the front). These are status lights only.

Lighting modes

Not available

Not available

Smart home

None of 3 known

Matter controlleriCan add and control Matter devices. Being a Matter device alone does not count.

Not available

Not available

Thread border routeriConnects Thread smart home devices to the home network.

Not available

Not available

Zigbee hubiA built-in Zigbee radio that controls Zigbee smart home devices.

Not available

Not available

Battery and charging

7 of 17 differ

Built-in battery

Yes3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026

Playback time (claimed)iMaximum maker-claimed music playback on one charge in normal playback mode. Battery extension or reduced-bass boost modes belong in battery_life_boost_h. Record volume and lighting conditions in the source note.

12h3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Page 25: up to 12 hours using Bluetooth A2DP at 50% volume, default EQ, Top 50 Global February 2024 tracks, 20-25 C. At maximum volume Bose specifies up to three hours.

20h1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Up to 20 hours of play time at default volume (42%). Actual life varies with use, settings and conditions.

Playback with battery extension (claimed)iTotal claimed runtime with the named battery extension mode enabled. Store the total, not only the extra hours. Keep sound and lighting restrictions in the source note.

Not available

Not available

Battery energyiPublished battery pack energy. Do not calculate from an assumed voltage.

Not available

22.5Wh2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Built-in Li-ion rechargeable battery 22.5 Wh. No voltage or mAh is published.

Battery capacityiPublished pack capacity at the voltage in battery_voltage_v. Do not substitute power-bank output capacity. A figure written per cell, such as 5000mAh*2, is not a pack capacity unless the maker states the pack figure.

Not available

Not available

Nominal battery voltage

Not available

Not available

Battery chemistry

Lithium-ion2Maker product pagesupport.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026

Lithium-ion1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Technical specs: rechargeable lithium-ion battery.

User-replaceable batteryiBattery that the maker documents as replaceable by the user. Service replacement does not qualify.

Not available

No2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Battery user replaceable: not recommended, improper assembly may affect waterproof performance.

Full charge timeiTime from discharged to full under the maker conditions. Adapter rating and simultaneous use belong in source notes.

4h3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Page 25: up to four hours from 0 to 100% in standby, 5 V/1.5 A (7.5 W) USB-A supply.

3h2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026About 3 hours from empty to full with a PD charger of 15 W or above.

Quick charge duration

Not available

Not available

Playback after quick chargeiClaimed music playback after quick_charge_min of charging. Source conditions apply.

Not available

Not available

Charging input ratingiPublished speaker input voltage and current. An adapter rating alone does not establish device input.

5 V DC, 1.5 A3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026Regulatory information, page 4: Input Rating 5 V DC, 1.5 A. This is device input, separate from adapter output.

Not available

Max charging inputiPublished maximum charging input. USB audio power requirements and adapter output are separate.

Not available

Not available

USB Power Delivery charging

Not available

Yes2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Charge rating: PD adapter 15 W or above, auto-switching 5 V, 9 V, 12 V and 20 V input. This does not state a maximum speaker input power.

Charges other devices

No1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Maker comparison table: Charging Out No.

Not available

Max power-bank outputiPublished power delivered by the speaker to another device. Output voltage and current belong in the source note.

Not available

Not available

Wireless chargingiThe speaker battery can be charged wirelessly. Wireless power output to another device is separate.

Not available

Not available

Durability

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Dust and water ratingiExact published IP rating. Keep separate ratings, such as IP68 and IP69, as separate entries.

IP671Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

IP671Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Page and launch release: IP67, dustproof, waterproof and floatable.4Press releasesilicon.co.uk/press-release/the-rugged-ultimate-ears-everboom-superior-sound-that-is-waterproof-dustproof-and-floatableRead 15 October 2026IP67: waterproof, dustproof and floatable.

Floats

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 20264Press releasesilicon.co.uk/press-release/the-rugged-ultimate-ears-everboom-superior-sound-that-is-waterproof-dustproof-and-floatableRead 15 October 2026

Drop resistanceiExplicit maker claim or defined drop test. Do not infer from rugged wording.

Yes1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Yes1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Page: drop it up to 1 m, drop-tested from 1 m.

Drop test heightiMaker-published tested height. Surface and conditions belong in source notes.

Not available

1m1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Drop-tested from 1 m (3 ft). Surface and method are not stated.

Carry featuresiPublished handles, straps, carabiners or wheels.

Nylon utility loop1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Carabiner, Fabric loop1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Page: use the carabiner to take it wherever you go.6Reviewsoundguys.com/ultimate-ears-everboom-review-119681Read 15 October 2026The included loop and carabiner.

Measured

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Playback time (measured)iReviewer-measured playback per charge. Volume, lighting, sound mode, firmware and connection belong in the source note.

7.05h5Reviewsoundguys.com/bose-soundlink-flex-2nd-gen-review-125253Read 8 October 2026Exact SoundLink Flex (2nd Gen) review: 7 h 3 min. Looping music at 80 dB from one meter. Firmware 4.3.30, Bose app 10.3.13. Volume is higher than the maker 50% runtime test.

Not available

Max sound pressure (measured)iReviewer-measured maximum SPL. Distance, test method and power source belong in source notes.

Not available

Not available

Low-frequency extension (measured)iReviewer-measured low-frequency limit. Threshold and test method belong in source notes.

Not available

Not available

High-frequency extension (measured)iReviewer-measured high-frequency limit. Threshold and test method belong in source notes.

Not available

Not available

Audio latency (measured)iReviewer-measured source-to-speaker latency. Source device, app, codec, firmware and connection belong in source notes. App compensation may affect results.

Not available

Not available

Full charge time (measured)iReviewer-measured time from empty to full. Power adapter and method belong in the source note.

Not available

Not available

Dimensions and weight

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DimensionsiSpeaker body width, height and depth on explicitly identified axes. Unlabeled tuples do not establish axis meanings. Handle, strap and orientation conditions belong in the source note.

Not available

Width110Height205Depth85mm(4.3 × 8.1 × 3.3 in)2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Speaker row: height 205 mm, length 110 mm, depth 85 mm. The retail box row is excluded. The US product page names the 85 mm axis width and the 110 mm axis length. The front face with the volume buttons is the 110 mm wide face, so 110 is stored as width.

WeightiSpeaker mass including its battery. Excludes packaging, charger and removable carry accessories unless the source states otherwise.

590g(1.3 lb)7Maker product pagebose.de/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026Technical specifications: complete product system 0.59 kg. Convert published metric value to grams. H/D axes are conflicting between US product sections and are omitted.

960g(2.1 lb)1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Dimensions table: 960 g (33.86 oz) for the speaker.2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026Speaker 960 g (33.86 oz). The retail box weighs 1415 g.

Body materials

Aluminum, Fabric, Nylon, Plastic, Silicone, Steel1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Post-consumer recycled plastic, Recycled polyester fabric, Rubberized silicone1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026Plastic parts include a minimum of 58 percent certified post-consumer recycled plastic by weight, excluding the printed wiring assembly and packaging. Speaker fabric is 100 percent recycled polyester.6Reviewsoundguys.com/ultimate-ears-everboom-review-119681Read 15 October 2026Rubberized silicone top and bottom, soft fabric around the rest.

Certifications

None of 1 known

FCC IDs

Not available

Not available

Other certifications

Not available

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In the box

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In the box

SoundLink Flex Portable Speaker (2nd Gen), USB-C to USB-A cable, Safety sheet1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

Ultimate Ears EVERBOOM, Carabiner, Quick start guide (printed inside box)1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026US page package contents: speaker, carabiner, quick start guide printed inside the box. The page says the USB-C cable is not included, while the specification article and the Australian datasheet list a USB cable. The cable is left out because of the conflict.

Links

Not compared

Product page

www.bose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.html1Maker product pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026

www.ultimateears.com/en-us/shop/p/everboom-bluetooth1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026

Spec sheet

support.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-gen2Maker product pagesupport.bose.com/s/article/product-specifications-bose-soundlink-flex-portable-speaker-2nd-genRead 8 October 2026Exact second-generation manufacturer support specification page. SE microphone exception explicitly identified. Non-SE reference model.

support.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOM2Maker product pagesupport.logi.com/hc/en-us/articles/22067973831447-Specification-UE-EVERBOOMRead 15 October 2026

Manual

assets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdf3Owner's manualassets.bosecreative.com/m/409c7c0457a61e44/original/891014_OG_SLFLXII-SPEAKERWIRELESS_en.pdfRead 8 October 2026

support.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOM3Owner's manualsupport.logi.com/hc/en-us/articles/22067951753751-Getting-Started-UE-EVERBOOMRead 15 October 2026Official EVERBOOM online getting started article.

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

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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 pagebose.com/p/speakers/bose-soundlink-flex-portable-speaker-2nd-gen/SLFLXII-SPEAKERWIRELESS.htmlRead 8 October 2026US maker page: included one-year Bose limited warranty. BoseCare paid extensions are excluded.

2years1Maker product pageultimateears.com/en-us/shop/p/everboom-bluetoothRead 15 October 2026US page embedded specs: 2-Year Limited Hardware Warranty.

Both are also in the API. Back to all wireless speakers.