Your needs, this model
Does it fit your priorities?
Can it stay connected to my phone and computer at the same time?
The M2 AEBT manual says it automatically attempts to reconnect to its last two connected Bluetooth devices and stores up to eight pairing profiles. It plays one audio source at a time, so this is a device-switching use, not two-stream mixing.
Explore this need in the finder →What does the 22-hour ANC rating actually describe?
Sennheiser’s M2 AEBT specifications state 22 hours for HFP plus ANC. Treat that as the named manufacturer operating condition, not as a separately documented music-only, passive, analog-cable, or remaining-used-battery estimate.
Explore this need in the finder →Does ANC work through the supplied 3.5 mm cable?
Yes, in the manual’s active cable mode: the headset is on and its NoiseGard ANC is enabled. The cable’s 2.5 mm plug locks into the headset and Bluetooth is disabled. The manual does not assign this analog ANC arrangement the 22-hour HFP-plus-ANC runtime figure.
Explore this need in the finder →Can I listen through the cable after its battery is empty?
The manual describes a separate passive mode with the cable connected and headset switched off; audio can pass, but NoiseGard ANC is disabled. Confirm that the exact seller includes a compatible 2.5 mm-to-3.5 mm cable.
Explore this need in the finder →Does its USB port mean USB audio is available?
The M2 manual says a computer can play a media player through the USB cable. This is digital USB audio, distinct from both Bluetooth and the analog jack; the manual does not provide a separate USB ANC runtime rating.
Explore this need in the finder →The end-of-life Black MOMENTUM 2 Wireless is most useful as a specific historical reference, not as an undifferentiated “older Momentum.” Its M2 AEBT manual separates Bluetooth ANC, powered cable ANC and passive cable playback; the advertised 22-hour condition is HFP plus ANC, not a catch-all runtime claim.
Verify the older model and exact offer
Sennheiser's U.S. store record identifies MOMENTUM 2 Wireless Black, product 8355856515355, U.S. Article No. 506250. The manual calls the model M2 AEBT, and the current manufacturer page marks the item end of life. Confirm that code on the actual offer: MOMENTUM 2, MOMENTUM 3 and later generations use different hardware and instructions. The manufacturer record documents the historic configuration; it does not prove that an independent seller has stock or reveal a used item's condition. The M2 manual describes a closed, around-ear design and a weight of about 265 g. Its four-microphone NoiseGard hybrid system is an ANC feature, not an independent acoustic test. A specification for ear coupling or mass cannot predict your comfort, glasses compatibility, clamp preference, seal or how much noise you personally hear. Check pad wear, headband and hinge condition in the exact unit before treating the product-photo silhouette as evidence of fit.Keep the 22-hour figure attached to HFP plus ANC
The M2 AEBT specification lists Bluetooth 4.0, aptX and an operating time of 22 hours (HFP + ANC). HFP is part of the maker's named condition, so the careful reading is a rated HFP-plus-ANC arrangement, not a separately identified 22-hour music-only result. Neither this page nor the underlying manual establishes what an older rechargeable battery will deliver now. Battery age, charge history, source behavior and actual use can make a second-hand unit's runtime differ substantially from a factory maximum. The manual says the headset tries to reconnect to the last two Bluetooth devices and can retain up to eight pairings. It plays audio from one source at a time. That makes it a potentially useful phone-and-computer switching reference, but it does not mix two streams or promise an uninterrupted handoff across every operating system. The second-device link is a Bluetooth arrangement; it should not be carried over to a cable connection.Powered cable ANC is not the passive fallback
The supplied-cable arrangement has its own operating states. The included style of audio lead uses a locking 2.5 mm plug at the headset and a 3.5 mm plug for the source. When the headphones are switched on with the audio cable attached, the manual calls this active mode and says NoiseGard ANC is enabled. The cable disables Bluetooth and call/music controls. Sennheiser does not list a separate analog ANC runtime for this model, so the 22-hour HFP-plus-ANC number should not be assigned to the cable. With the battery empty and the headphones switched off, the manual describes passive cable playback. That offers a possible wired fallback, but NoiseGard ANC is disabled in passive mode. It is therefore wrong to treat “has ANC” and “can play passively” as if both occur in one operating state. If ANC is essential on a long trip, plan for a charged battery; if the battery-empty fallback is essential, decide whether ANC can be absent in that mode.USB is a third route
The manufacturer manual also describes using the USB cable to play a media player from a computer. It is digital USB audio, not the 2.5 mm analog input. The manual notes that connecting to a computer by USB can switch the headphones off; to keep listening over Bluetooth, the user must switch them back on. The document does not give USB audio a separate ANC-on runtime rating, so do not infer one from the Bluetooth specification or assume a charging port alone establishes every host behavior. The M2 may suit a comparison where older Bluetooth multipoint and a plainly documented passive cable state matter. Its limits are equally specific: a version from an earlier product cycle, micro-USB-era charging, no stated wired ANC runtime, and an older battery whose present condition is unknown. The U.S. store's EOL notice is not a statement about an individual seller's supply or warranty.Checks for a used or remaining-stock listing
Ask for a clear label or photo showing Article No. 506250 or model M2 AEBT. Ask whether the battery charges and holds charge under use, whether the 2.5 mm jack locks securely, and whether the correct audio lead is included. Inspect the pads, folds, hinges, buttons, cable strain relief and case, and confirm the seller's exact return terms. Do not assume a listing photo shows the shipped accessories or the condition of the physical item. Check phone and computer support for the intended Bluetooth profiles or USB audio route before buying; this review did not test a device combination. This is a research-based assessment of Sennheiser's U.S. product record and M2 AEBT manual, not a hands-on trial. The manual's 22-hour HFP-plus-ANC specification, active cable mode and passive off-state are separate evidence-backed facts. Compare the exact older MOMENTUM 2 Article No. 506250 offer with the separately documented MOMENTUM 3 or PXC 550 only if those references match the age and features under consideration; their ratings and plans do not transfer between models.Manufacturer sources
The Sennheiser U.S. product page and its public product record establish the U.S. model identity and end-of-life status. Technical details are from Sennheiser's M2 AEBT instruction manual; that official PDF endpoint returned 404, and a direct request for the linked third-party manual page returned 403. No full manual copy is claimed as locally captured; the specifications and operating passages were checked against indexed excerpts of the same-model manufacturer-authored manual.
Key specifications
Key details at a glance
| Fit | Over-ear / around-ear |
|---|---|
| Active noise cancellation | Yes |
| Maximum continuous music playback (ANC on) | 22 hours |
| Headset weight | 265 g |
| Bluetooth version | 4.0 |
| Bluetooth audio codecs | aptX |
| Simultaneous Bluetooth devices | 2 |
| Analog audio input | 2.5 mm locking headset jack; included audio cable has a 3.5 mm source plug |
| Analog cable included | Yes |
| Passive analog playback with headset off | Yes |
| Approximate charge time | 3 hours |
Use the exact model’s instructions for operating limits, supplied equipment and version differences.
Sources for this review
Sources for this assessment
- Sennheiser U.S. MOMENTUM 2 Wireless Black product page and end-of-life statement
- Sennheiser U.S. public product record, Article No. 506250 and variant identity
- Sennheiser MOMENTUM Wireless M2 AEBT instruction manual, official asset index
- Sennheiser M2 AEBT instruction manual, complete manufacturer-authored text reproduced by ManualsLib
Check this model against your routine
Use the finder to test documented connection, ANC and battery requirements together. A match is not proof of personal comfort or measured quiet.