Headsets and headphones / Compare

Alienware Pro Wireless Gaming Headset vs beyerdynamic MMX 300 PRO

A

Product A: Alienware

Pro Wireless Gaming Headset

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B

Product B: beyerdynamic

MMX 300 PRO

64 of 161 known

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All 161 fields

Every value links to where we found it.

Only differences

AAlienware Pro Wireless Gaming Headset

Bbeyerdynamic MMX 300 PRO

General

6 of 8 differ

Series

Pro1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

MMX1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Maker describes the product as part of its MMX series.

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

PRO-HS, 9K2M11Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Lunar Light reference: current Dell store part 9K2M1. PRO-HS is the regulatory headset model in the user guide. Receiver UD2202u is excluded.

7306701Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

GTIN / EAN

Not available

40101187306721Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

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

24 September 20242Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026

2 July 20242Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026Release body is dated Heilbronn, 2 July 2024. CMS header is 1 July. Body identifies the launch and immediate availability.

Status

Available1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Available1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Exact standard black model is offered for purchase and next-business-day shipment. MANUFAKTUR is excluded.

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.

$229.993Press articletechradar.com/gaming/consoles-pc/the-new-alienware-pro-headset-releases-next-month-featuring-hybrid-active-noise-cancellation-and-graphene-coated-driversRead 23 October 2026September 24, 2024 launch reporting names North America October availability at USD 229.99. US price excludes sales tax.

$299.993Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Contemporaneous 30 July 2024 US review specifies MSRP $299.99 for this exact model. US price excludes sales tax.

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

€2992Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026German launch recommended retail price, including VAT. Current discounts are excluded.

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

Not available

DE2Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026Launch explicitly offers the product in the German maker shop.

ColoursiThe maker's own colour names

Lunar Light1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

black1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Segment

Gaming1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Gaming1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Design

0 of 7 differ

Form factor

Over-ear1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Over-ear4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Ear cup enclosureiClosed, open or semi-open acoustic enclosure. This does not describe how the headset folds.

Closed8Reviewlesnumeriques.com/casque-gaming-micro/alienware-pro-headset-p75658/test.htmlRead 23 October 2026

Closed4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Wearing style

Headband1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Headband4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

FoldingiFlat means the ear cups rotate flat. Inward means the ear cups fold toward the headband.

None7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026Reviewer explicitly states cups cannot rotate flat or fold inward.

None3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Design section explicitly says it does not fold.

Swivelling ear cupsiEar cups can rotate relative to the headband. Tilting alone does not count.

No7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026

No3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Design section says cups do not swivel. Limited lateral fit adjustment is distinguished from swivel.

RGB lighting

No8Reviewlesnumeriques.com/casque-gaming-micro/alienware-pro-headset-p75658/test.htmlRead 23 October 2026Introduction explicitly says the headset has no RGB LEDs.

No3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Specification table lists Lighting: None.

Lighting zonesiNumber of independently controllable lighting areas across both ear cups.

Not available

Not available

Drivers and sound

13 of 20 differ

Driver type

Not available

Dynamic4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Driver sizeiDiameter of the largest sound driver. Do not use the microphone capsule diameter.

50mm1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

45mm5Retailer pagemicrocenter.com/product/685512/beyerdynamic-mmx-300-pro-wired-gaming-headsetRead 23 October 2026Exact 730670 specification tab states Driver 45 mm.

Drivers per sideiNumber of sound-producing transducers in one side, excluding microphones.

Not available

Not available

Diaphragm material

Graphene-coated1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Not available

Magnet

Not available

Neodymium5Retailer pagemicrocenter.com/product/685512/beyerdynamic-mmx-300-pro-wired-gaming-headsetRead 23 October 2026Exact 730670 specification tab states Magnet: Neodymium. Unreliable aggregator claims are not used.

Frequency response (wired or passive)iPublished acoustic range for wired listening, or the maker’s single range when no mode is distinguished. Power state and test standard belong in the source note.

Min20 HzMax40 kHz2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Single maker acoustic output range. Not a Bluetooth transmission passband.

Min5 HzMax40 kHz4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2 headphone technical specifications. Published acoustic range under EN 60268-7.

Wireless audio transmission bandiFrequency range of audio transmitted over the wireless connection, not the acoustic response of the driver. Codec, sampling rate and bitrate conditions belong in the source note. When the maker gives a range per codec, the widest range is stored and its codec goes in the source note.

Not available

Not available

Impedance (passive when specified)iUse the headset-off value for a passive analog connection when the maker publishes both powered and passive values. Note the power state and test frequency.

32Ω1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Published 32 ohm. Power state and test frequency are unstated.

48Ω4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2, nominal impedance per system. Analog-only model.

Sensitivity (passive when specified)iUse the headset-off figure when both powered and passive values exist. The power or voltage reference, test distance and frequency belong in the source note.

115dB2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Page 3: 115 +/- 3 dB at 1 mW and 1 kHz. No power state is stated.

96dB4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2, 96 dB SPL at 1 mW and 500 Hz.

Sensitivity referenceiPublished power or voltage reference for sensitivity. Do not assume 1 mW when the source gives only a dB value.

Per 1 mW2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026

Per 1 mW4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

THD (claimed)iPublished distortion figure or numerical upper bound. The source note states any less-than sign and test level.

Not available

0.05%4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2 states less than 0.05% at 500 Hz. Stored numerical upper bound. Test sound level is not given.

Max input power

50mW4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 9 maximum driver input power 50 mW.

30mW4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2 power handling capacity 30 mW.

Max digital audio sample rateiHighest supported digital audio sample rate over a USB cable or wireless dongle. This is not the microphone rate or acoustic frequency response.

96kHz4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 27 Hi-Res is available only over wired USB. Windows format is two channels, 24 bit, 96000 Hz.

Not available

Max digital audio bit depthiHighest published digital playback bit depth over a USB cable or wireless dongle.

24bits4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 27 wired USB playback. The receiver is not claimed to carry 96 kHz.

Not available

DAC

Not available

Not available

Personalised soundiA manufacturer-supported hearing test or ear scan creates a device sound profile tailored to the listener. Generic equalizer adjustments do not count.

Not available

Not available

Onboard EQiCustom playback EQ profiles stored in the headset and applied without the host app running. Note supported active connections. Receiver-only or software-only EQ does not count.

Not available

No3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Entirely analog headset with no built-in processing or bundled software. EQ requires external host processing.

Custom EQ bandsiNumber of bands in the custom playback equalizer. Microphone EQ bands are excluded.

107Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026Ten-band EQ through Windows Dolby Access. Does not establish headset-stored EQ.

Not available

EQ presets

Not available

Not available

Volume limit

Not available

Not available

Spatial audio

2 of 3 differ

Spatial audio supportiNamed headset or host spatial-audio systems that the maker or reviewer explicitly supports. A platform feature may require compatible hardware, software or a separate licence.

Dolby Atmos for Headphones4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Spatial audio licence includediA paid spatial-audio licence is bundled or embedded. Compatibility with a separately purchased app does not count.

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 22: Dolby Access automatically detects the connected headset and activates Dolby Atmos for Headphones. Windows 10 or 11 required.

No3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Review explicitly says no built-in virtual surround and no bundled surround software.

Head tracking

Not available

Not available

Noise cancelling

4 of 10 differ

Active noise cancelling

Yes1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

No6Reviewsoundguys.com/beyerdynamic-mmx-300-pro-review-121186Read 23 October 2026Exact-model FAQ explicitly says active noise cancellation is absent. The directional microphone is separate.

ANC typeiFeedforward uses outside microphones. Feedback uses inside microphones. Hybrid uses both. Voice-call noise filtering is separate.

Hybrid1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Not available

ANC microphonesiTotal microphones used for active playback noise cancellation across both sides. Do not substitute the total physical or voice microphone count.

Not available

Not available

Adaptive ANCiNoise cancellation automatically changes with the environment or fit. Manually choosing a level does not count.

Not available

Not available

ANC levelsiNumber of adjustable cancellation strength steps. Off and transparency modes are excluded.

Not available

Not available

ANC attenuation (claimed)

Not available

Not available

Transparency mode

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Adjustable transparency

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 25: five transparency levels. This is not five ANC strength levels.

Not available

Conversation detectioniAudio pauses or lowers automatically when the wearer speaks. Voice assistant activation does not count.

Not available

Not available

Wind noise reduction

Not available

Not available

Measured

4 of 21 differ

Frequency response notesiMeasured by a reviewer, not claimed by the maker

SoundGuys measured a small bass rise below 100 Hz and elevated treble from 5 to 10 kHz. ANC changes the bass response substantially.7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026SoundGuys B&K 5128 measurements versus its target. Headset 3.6.0, dongle 2.8.0. Different ANC modes were plotted separately. No regional peak or perceived-loudness percentage is substituted for full-range deviation or attenuation fields.

The measured response has reduced sub-bass, a lower-midrange dip and a pronounced treble peak.7Measurementsoundguys.com/beyerdynamic-mmx-300-pro-review-121186Read 23 October 2026Objective Measurements section compares the stock headset with the SoundGuys house target. Lower-midrange dip is around 200 to 500 Hz and treble peak around 6 to 8 kHz. Rig and firmware are not specified in this review.

Bass amountiReviewer’s bass deviation from its stated target. Positive is more bass. Target and test method belong in the source note.

Not available

Not available

Treble amountiReviewer’s treble deviation from its stated target. Positive is more treble. Target and test method belong in the source note.

Not available

Not available

Deviation from targetiReviewer’s full-range error from its target curve. Do not substitute a regional bass or treble error.

Not available

Not available

Consistency between fittingsiReviewer’s standard deviation across repeated fittings. Test rig and fitting procedure belong in the source note.

Not available

Not available

Harmonic distortioniIndependently measured harmonic distortion, with test level and method in the source note.

Not available

Not available

Sound leakageiIndependently measured leakage at 30 cm. Playback level and method belong in the source note.

Not available

Not available

Measured noise isolationiIndependently measured attenuation. Positive values mean more noise reduction. ANC state, rig and frequency bands belong in the source note.

Not available

Not available

Noise isolation (measured, best)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

Mic quality notesiMeasured by a reviewer, not claimed by the maker

Not available

Speech recordings sound natural and clear in the ideal-condition sample. Office and reverberant samples are also provided.7Measurementsoundguys.com/beyerdynamic-mmx-300-pro-review-121186Read 23 October 2026Reviewer recorded ideal, office and reverberant-space speech samples. No numeric speech-to-noise ratio or bandwidth is inferred.

Mic low-frequency extensioniMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic high-frequency extensioniMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic speech-to-noise ratioiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Measured latencyiEnd-to-end latency measured by a reviewer for a specific connection, platform and codec. Firmware, method and operating mode belong in the source note.

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Measured battery lifeiReviewer’s continuous playback test. State the connection, ANC and lighting where known. Unknown settings stay omitted and are described in the source note.

AAlienware Pro Wireless Gaming Headset

Connection	ANC	Hours (h)
2.4 GHz	No	71.55

Source7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 202671 hours 33 minutes converted exactly to 71.55 h. PC through USB-C receiver, ANC off. Headset firmware 3.6.0 and dongle 2.8.0. Review uses SoundGuys standardized continuous playback test and B&K 5128. Playback level is not restated in the review.

Bbeyerdynamic MMX 300 PRO

Not available

Battery life (measured, max)iMeasured by a reviewer, not claimed by the maker

71.55h=CalculatedFrom Measured battery life

Not available

Clamping forceiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Weight (measured)iIndependently weighed headset. A review that repeats the maker’s number does not qualify. Cable and microphone inclusion belong in the source note.

Not available

Not available

Microphone

12 of 16 differ

MicrophoneiMain microphone used for speech. Secondary internal microphones may be described in the source note.

Detachable boom4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Fixed boom3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Design and microphone sections explicitly describe a non-detachable rotating gooseneck boom.

Microphone element

Not available

Electret condenser4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Microphone pickup patterniUse the maker’s exact named pattern. Unidirectional does not establish whether the capsule is cardioid, supercardioid or hypercardioid.

Unidirectional4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Cardioid4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Voice microphonesiTotal microphones used for voice pickup or beamforming across both sides. ANC-only microphones are excluded.

21Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Two-microphone AI voice beamforming. This is not the physical total including ANC microphones.

Not available

Total microphonesiEvery physical microphone across the headset, including call, ANC and calibration microphones. Shared microphones count once. Excludes microphones in charging cases or receivers, and vibration sensors. Use an explicitly published physical total, never a sum of overlapping role counts.

Not available

Not available

Mic frequency responseiAcoustic microphone response, not its digital sampling rate. Connection-specific ranges belong in the source note.

Min100 HzMax10 kHz2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026

Min20 HzMax20 kHz4Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026Page 2 microphone technical specifications, EN 60268-7. Sensitivity is stated as 21.6 mV/Pa at 1 kHz, which has no directly compatible mV field.

Mic sensitivityiPublished microphone sensitivity. Reference such as dBV/Pa or dBFS, frequency and distance belong in the source note.

-44dB2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Page 3: -44 +/- 3 dBV/Pa. Frequency and distance are not named.

Not available

Mic signal-to-noiseiPublished microphone signal-to-noise ratio. Minimum or typical conditions belong in the source note.

55dB2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Page 3: 55 dB. No test conditions are stated.

Not available

Mic sample rateiExplicitly published digital microphone capture or speech sampling rate. State the audio route in the source note, or say it is unpublished. Internal capture does not prove the effective rate on every connection. Acoustic bandwidth, playback rate and generic microphone-chip capability do not qualify.

Not available

Not available

Mic noise reductioniProcessing that removes noise from transmitted speech. Playback ANC and a directional microphone alone do not count.

AI4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

None3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Microphone section distinguishes cardioid directionality from software noise cancellation. No transmitted-speech DSP is present.

Flip to mute

Not available

Not available

Mute button

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Mute indicatoriPublished indication of microphone mute. mechanical_marker is a visible physical marker showing the microphone's mute-switch position. LED options require an electronic light. The in-line controller option is for a mute light on a cable remote.

LED on mic, Voice prompt4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 26: boom LED turns red and voice prompt says Mic on or Mic off.

Physical mute marker8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed page 5: sliding the mute switch down exposes a red physical marking. This is not an LED.

Sidetone

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Adjustable sidetone

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 26: five sidetone levels in AWCC, default level 3.

Not available

Foam microphone windscreeniA foam cover for the voice microphone. An internal metal mesh pop filter does not count.

Yes4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 13 explicitly describes the microphone foam shield.

Yes3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Review explicitly identifies a removable foam pop filter.

Connectivity

14 of 20 differ

Audio connectionsiConnections that carry playback audio. Charging or firmware USB alone does not count as USB audio.

USB, 2.4 GHz, Bluetooth5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Analog8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed pages 4 to 5 describe analog headphone and microphone plugs, plus console combination-jack adapter.

Analog source plugsiAnalog plug(s) supplied for the source device, including adapters. The headset-side jack is listed separately.

Not available

Dual 3.5 mm, 3.5 mm TRRS9Retailer pagethomann.fr/beyerdynamic_mmx_300_pro.htmRead 23 October 2026Exact product lists dual 3.5 mm source plugs and supplied two-female-to-one-TRRS console adapter. Confirmed by public Chrome retailer page after normal intl fetch failed.

Cable connector on headsetiConnection used by the playback cable at the headset. A fixed cable is not replaceable through a headset jack.

USB-C5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

3.5 mm2Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026Connector table explicitly identifies 3.5 mm at the headset cable end. Manual page 4 specifies five poles and locking protection. This does not imply compatibility with generic TRS cables.

Longest included cableiLength of the longest supplied cable, including charging and dongle cables. Individual cable lengths are listed in Cables included.

2m2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026

2.5m8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed page 7: included straight playback cable is 2.5 m. Optional 1.2 m console cable is excluded.

Headset USB plug or portiUSB plug or port on the headset or its included wired audio adapter. A charging-only USB port can appear here.

USB-C5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Audio over USB-C cableiPlayback through a USB-C cable or included wired USB-C audio adapter. A charging-only USB-C port does not count.

Yes5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Pages 17 to 19 show USB playback and recording endpoints. Inserting the USB cable disconnects the wireless link.

No3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Review identifies an entirely analog model with 3.5 mm audio only.

Passive wired listeningiAnalog playback works with the headset powered off or its battery empty. An active analog converter that needs headset power does not count.

Not available

Yes3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Entirely analog headset. The playback drivers use source power. Microphone needs the host mic bias supply specified by maker, not a headset battery.

Wireless receiveriDedicated wireless audio receiver or dongle. A wired USB sound card does not count.

Included1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

None3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Wired-only model. Supplied adapter is passive analog, not a wireless receiver.

Wireless receiver connectoriPhysical USB connector on the receiver. Supplied extension cables and adapters are explained in the source note. Both means two native connector types.

USB-C1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Native USB-C receiver with supplied USB-A adapter.

Not available

Wireless range (claimed)iMaker’s advertised wireless range. Connection and indoor or outdoor conditions belong in the source note. Measured distance is not stored here.

30m2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Page 3 claims Bluetooth 5.3 range up to 30 m/100 ft. The newer manual recommends staying within 10 m for troubleshooting. This does not replace the advertised maximum.

Not available

Bluetooth

5.31Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Not available

Bluetooth codecsiNamed Bluetooth audio codecs supported by this exact model. Host, firmware and operating-mode restrictions belong in the source note.

SBC, AAC8Reviewlesnumeriques.com/casque-gaming-micro/alienware-pro-headset-p75658/test.htmlRead 23 October 2026Les Numeriques explicitly reports SBC and AAC with Bluetooth 5.3. Firmware 3.5, receiver 2.7, AWCC 6.5.9.0. No LC3 or LE Audio assertion.

Not available

LE AudioiLE Audio playback support. Bluetooth Low Energy for app control alone does not count.

Not available

Not available

AuracastiAuracast broadcast audio support. Required phone, firmware and app conditions belong in the source note.

Not available

Not available

Bluetooth multipointiCan remain connected to multiple Bluetooth source devices at once. Mixing Bluetooth with a proprietary dongle is a separate field. A maker's dual connection to two Bluetooth devices at once counts.

No9Reviewtomsguide.com/gaming/gaming-peripherals/alienware-pro-wireless-gaming-headset-reviewRead 23 October 2026Spec table explicitly says no multipoint and one connected device. This does not establish paired-device memory capacity.

Not available

Multipoint devicesiNumber of Bluetooth source devices connected at once, not the number remembered for later pairing.

Not available

Not available

Paired devices remembered

Not available

Not available

Mixes 2.4 GHz and Bluetooth audioiPlays both wireless audio streams at the same time. Automatic switching or Bluetooth standby does not count.

No7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026

Not available

Fast pairing

Not available

Not available

Base station

Not available

Not available

Latency

1 of 2 differ

Low latency modeiA selectable mode intended to reduce audio delay. A low-latency connection without a distinct mode does not count.

Yes5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 28: Bluetooth gaming mode toggles by holding microphone mute for five seconds. Default is off. No numeric latency claim is published.

Not available

Claimed latencyiMaker’s claimed delay for the stated connection and mode. Minimum claims and host restrictions belong in the source note.

Not available

Not available

Compatibility

2 of 3 differ

Compatible platformsiPlatforms with a documented audio path. This does not imply every connection or microphone function works. Platform editions must be checked individually.

Windows, macOS, PS5, PS4, Nintendo Switch, Nintendo Switch 2, SteamOS, Android, iOS9Reviewtomsguide.com/gaming/gaming-peripherals/alienware-pro-wireless-gaming-headset-reviewRead 23 October 2026Review lists Mac, Windows, PS4/5, Switch/Switch 2 and Steam Deck. Maker page explicitly lists Android and iOS. Xbox is excluded.

Windows, PS5, PS4, Nintendo Switch1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Maker names PC, PS5, PS4 and Nintendo Switch. Exact Windows 10/11 support is separately published by Micro Center. Generic Xbox lacks a generation, so no Xbox generation is inferred.5Retailer pagemicrocenter.com/product/685512/beyerdynamic-mmx-300-pro-wired-gaming-headsetRead 23 October 2026System requirements explicitly names Windows 10 and Windows 11. Console names are backed by maker page.

Connection per platformiOnly explicitly documented playback paths for the exact model. Microphone support is separate. Leave unknown microphone support omitted. An Xbox and a PlayStation edition of one headset can connect differently, so it is per variant.

AAlienware Pro Wireless Gaming Headset

Platform	Connection	Microphone works
Windows	USB	Yes
Windows	2.4 GHz	Yes
PS5	2.4 GHz	Yes
Nintendo Switch	2.4 GHz	Not available
Android	Bluetooth	Not available
iOS	Bluetooth	Not available

Source9Reviewtomsguide.com/gaming/gaming-peripherals/alienware-pro-wireless-gaming-headset-reviewRead 23 October 2026Manual pages 14 and 17 to 19 document Windows USB and receiver playback/recording. Tom's Guide tests PS5 receiver and microphone. SoundGuys confirms Switch receiver and mobile Bluetooth. No blanket claim that every platform supports every path.

Bbeyerdynamic MMX 300 PRO

Platform	Connection	Microphone works
Windows	Analog	Yes
PS5	Analog	Not available
PS4	Analog	Not available
Nintendo Switch	Analog	Not available

Source1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Manual page 4 documents separate PC audio output and microphone input. Maker FAQ documents 3.5 mm console playback. Console microphone support is not separately established.

Official licence

Not available

Not available

Battery and charging

11 of 13 differ

Battery capacityiRated capacity of one headset battery. Do not use case, receiver or total multi-battery capacity.

750mAh5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

Swappable batteryiBattery can be exchanged by the user as part of normal operation. Service or recycling disassembly does not count.

No8Reviewlesnumeriques.com/casque-gaming-micro/alienware-pro-headset-p75658/test.htmlRead 23 October 2026Technical table explicitly says removable battery: No.

Not available

Batteries includediNumber of headset batteries supplied, including the one already installed.

Not available

Not available

Claimed battery lifeiMaker’s maximum playback time per stated connection, codec, ANC, spatial audio and lighting settings. Name the spatial processing mode and other conditions in the source note. Unknown settings stay omitted.

AAlienware Pro Wireless Gaming Headset

Connection	ANC	Hours (h)
Bluetooth	No	75
2.4 GHz	No	70
2.4 GHz	Yes	35

Source5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 11 playback claims. Maker store footnotes: default playback volume, third-party maker-commissioned testing in July 2024. These are maker claims, not independent measured results. Talk time of 35/25 hours is excluded.

Bbeyerdynamic MMX 300 PRO

Not available

Battery life (claimed, max)

75h=CalculatedFrom Claimed battery life

Not available

Battery life with ANC (claimed)

35h=CalculatedFrom Claimed battery life

Not available

Battery life without ANC (claimed)

75h=CalculatedFrom Claimed battery life

Not available

Charging port

USB-C5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

None3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Entirely analog wired model with no battery or charging hardware.

Full charge timeiPublished time to fully charge a depleted headset. In-use charging can take longer.

150min5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 11: less than 2.5 hours from flat to full. Stored 150 minutes is the published upper bound, not an exact measured duration.

Not available

Quick charge timeiCharge duration in the maker’s quick-charge claim. Read together with Quick charge playback.

15min6Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Not available

Quick charge playbackiPlayback gained from Quick charge time. Charger power, codec, volume and ANC conditions belong in the source note.

8h6Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Product features and footnote 9: up to eight hours playback after fifteen minutes charging, receiver mode, ANC off, default volume. July 2024 maker-commissioned third-party test. An older Dell 520-BBKM listing says six hours, while current page and original launch sheet say eight.

Not available

Use while charging

Yes5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026USB cable provides wired playback and charging together. Pages 10 and 17 say it disconnects wireless audio.

Not available

Charging dock or stand

Not available

Not available

Controls

3 of 6 differ

Controls

Buttons, Volume wheel, Slider5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

In-line remote, Volume wheel, Slider8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed page 5 shows cable volume wheel and sliding mic mute switch. Maker product-page Without Remote row is incorrect and contradicted by this exact manual and datasheet.

Volume control

Wheel5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

In-line remote8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed page 5 locates volume control on the included cable remote.

Game and chat mixiBalances separate game and chat audio streams. Mixing Bluetooth and dongle source volume alone does not count. Supported platforms belong in the source note.

None7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026No headset game/chat balance. Separate Windows endpoints can be mixed using third-party software.

Not available

Remappable controlsiOn-device button, touch or dial functions can be reassigned. Changing EQ alone does not count.

Not available

Not available

Wear detection

Not available

Not available

Voice assistant

Not available

Not available

Comfort and build

5 of 11 differ

Headband type

Padded7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026

Padded3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026

Headband material

Leatherette and memory foam2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026

Leatherette over padding3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Design section describes a black leatherette-covered padded headband.

Frame material

Metal headband frame7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026Reviewer identifies the adjustable headband frame as metal.

Spring steel headband core1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Ear cup material

Not available

Plastic3Reviewtomshardware.com/peripherals/gaming-headsets/beyerdynamic-mmx-300-pro-reviewRead 23 October 2026Design section explicitly identifies plastic earcups.

Ear pad material

Leatherette with memory foam1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026

Velours1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Replaceable ear pads

Yes5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 29 shows pulling the complete pad assembly away from the headset. Attachment mechanism is not named clearly enough to store an enum.

Yes1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Ear pad attachmentiHow a replacement ear pad attaches to the ear cup, not how the decorative outer cover attaches. A press-fit or snap-on pad counts as clip.

Not available

Not available

Ear pad openingiUsable opening inside an ear pad, excluding the outer cushion. Depth is the internal space between pad surface and driver cover.

Not available

Not available

Ear tips included

Not available

Not available

Dust and water rating

Not available

Not available

User-replaceable parts

Ear cushions, Boom microphone5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Ear pads, Headband pad, Cable1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Maker explicitly lists earpads, headband and cable as replacements. Manual pages 4 and 6 show user removal.

Software

3 of 3 differ

Companion app

Alienware Command Center and Dolby Access5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

App platforms

Windows5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

Not available

User firmware updates

Yes5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 23: manual update utility or AWCC update tab upgrades headset and receiver.

Not available

Dimensions and weight

2 of 2 differ

Headset weightiPublished headset mass without detachable cable or microphone when stated. A fixed cable remains included. Any unqualified maker weight is identified in the source note.

315g(11.1 oz)5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 9 approximate 315 g, headset only. Microphone inclusion is not separately specified.

314g(11.1 oz)1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026Technical data explicitly says headphones without cable: 314 g. Current datasheet and manual agree. Launch press table instead says 318 g and is superseded.

Headset dimensionsiBody size with headband upright and ear cups in their normal wearing position. Width is across the head, height is top to bottom, and depth is front to back. Folded or flat-swivel dimensions are not substituted.

Height205mm5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 9 gives height 205 mm, length 148 mm and width 90.2 mm. Launch sheet names 150 mm width and 90.2 mm depth. Only the unambiguous shared height is stored because axes and width conflict.

Not available

Certifications

1 of 3 differ

Hi-Res Audio

Hi-Res Audio5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026Page 27 wired USB only. Maker launch sheet explicitly names Hi-Res Audio certification.

Not available

Communication certifications

Not available

Not available

FCC ID

2AYYS-PRO-HS10Regulatory filingfcc.report/FCC-ID/2AYYS-PRO-HS/7264752.pdfRead 23 October 2026Public UL FCC radio report 4791096000-US-R1-V0 identifies gaming headset PRO-HS. Matches the Dell manual regulatory model, not AW725H.

Not available

Other certifications

Not available

Not available

In the box

2 of 3 differ

In the box

Alienware Pro Wireless Gaming Headset, USB-C wireless dongle, USB-A to USB-C adapter, 2 m USB-A to USB-C cable, Detachable boom microphone, Microphone foam shield, Documentation5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026

MMX 300 PRO headset, 2.5 m PC cable, 15 cm console adapter, Gooseneck pop screen2Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026Scope of delivery table. Standard black model only.

Cables includediSupplied playback, charging, dongle and adapter cables. A permanently attached headset cable is included and named as fixed.

AAlienware Pro Wireless Gaming Headset

Type	Length (m)	Count
USB-A to USB-C charging and playback cable	2	1

Source5Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026USB-A to USB-C cable carries wired playback as shown in the guide. Two-meter cable length is stated in the launch sheet.

Bbeyerdynamic MMX 300 PRO

Type	Length (m)	Count
Detachable headset cable to dual 3.5 mm PC plugs	2.5	1
Dual 3.5 mm sockets to 3.5 mm combination-jack console adapter	0.15	1

Source2Press releasebeyerdynamic.prezly.com/gaming-headset-with-studio-sound-beyerdynamic-releases-the-new-mmx-300-proRead 23 October 2026Launch table gives each supplied cable length. Optional short console cable is not included.

Carrying caseiSupplied carrying case or pouch. A retail carton does not count as a carrying case.

None7Reviewsoundguys.com/alienware-pro-wireless-headset-review-126031Read 23 October 2026Reviewer explicitly states no protective case is included.

None6Reviewsoundguys.com/beyerdynamic-mmx-300-pro-review-121186Read 23 October 2026Use section explicitly says it does not come with a carrying case.

Links

Not compared

Product page

www.dell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m11Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026Read the public page successfully with IAB after normal web fetch timed out.

europe.beyerdynamic.com/p/mmx-300-pro1Maker product pageeurope.beyerdynamic.com/p/mmx-300-proRead 23 October 2026

Spec sheet

gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdf2Maker spec sheet (PDF)gzhls.at/blob/ldb/1/f/7/9/66c8bad58a3f8fcee11cde9124b9441e83ca.pdfRead 23 October 2026Original Dell launch press sheet on a public distributor/spec-comparison mirror.

api.beyerdynamic.de/amfile/file/download/file/17594Maker spec sheet (PDF)api.beyerdynamic.de/amfile/file/download/file/1759Read 23 October 2026

Manual

dl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdf4Owner's manualdl.dell.com/content/manual7371741-alienware-pro-wireless-gaming-headset-user-s-guide.pdfRead 23 October 2026August 2025 Rev. A01 user guide, 36 pages. Read full text using the identical publicly available Icecat retailer mirror when direct download failed.

api.beyerdynamic.de/amfile/file/download/file/17608Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026

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.

2years1Maker product pagedell.com/en-us/shop/gaming/apd/alienware-pro-wireless-gaming-headset/9k2m1/9k2m1Read 23 October 2026US product page lists two-year limited warranty. Manual also confirms a two-year limited hardware warranty.

2years8Owner's manualapi.beyerdynamic.de/amfile/file/download/file/1760Read 23 October 2026Printed page 7 gives beyerdynamic limited warranty of 2 years. European/German reference. Retailer warranty extensions are excluded.

Both are also in the API. Back to all headsets and headphones.