About the Sennheiser MM 400
Going somewhere? Don't forget your Sennheiser MM 400 portable headphones. They're fantastic for enjoying your music and managing your phone calls without getting tangled up in cords. Built-in Bluetooth technology lets you make a hassle-free wireless connection to compatible devices, such as many cell phones, laptop computers, tablets, and MP3 players. You can even use the integrated volume, track skip, and call answer/end buttons on the right earcup for convenient operation while your phone or music player remains safely in your pocket, purse, or backpack.
Great comfort, sound, and convenience
The MM 400's soft padded ear cushions and adjustable headband provide a comfortable fit for hours of relaxed listening, making these 'phones great to have on long trips. The headset's folding design makes for easy storage when you travel. Sennheiser's patented Duofol™ diaphragms deliver detailed, crystal clear sound. And just in case you need it, Sennheiser includes a cable plus an airline adapter for a direct wired connection in situations where Bluetooth isn't permitted, or you want to make use of in-seat entertainment and other wired sound sources.
From the review Sennheiser MM 100 and MM 400 Bluetooth headsets: A family review of a headphone family
"I found the MM 400's light enough to wear for extended periods without any ear fatigue. The open-ear design gave the performance an airy, open feel..."
— Marshall, Crutchfield A/V Writer
Product highlights:
- portable, folding, on-the-ear design
- padded, closed earcups and adjustable headband
- Bluetooth® wireless operation
- built-in microphone and wireless earcup controls for hands-free conversations using compatible Bluetooth cell phones
- rechargeable lithium-polymer battery included
- single battery charge gives you:
- up to 20 hours Bluetooth talk time
- up to 10 hours Bluetooth listening time
- advanced Duofol™ drivers for outstanding sound quality
- integrated controls on the right earcup for track, volume, and answer/end call functions
- frequency response 15-22,000 Hz
- 56" detachable audio cable with stereo mini plug included for wired listening options
- airline adapter, USB charging cable, multi-country wall charging adapter, and carrying case included
- weight: 3.7 oz.
- warranty: 2 years
- MFR # MM400
What's in the box:
Sennheiser MM 400 owner's manual
- Bluetooth portable wireless headphones
- Lithium Polymer battery (installed/ 3.7 volt/ 1 Wh)
- 56" Wired cable (2.5mm connector on one end and right-angle 3.5mm connector on other)
- 48" Charging cable (USB type-A connector on one end and micro USB type-B on other)
- Power supply adatper (5 volt DC/0.5 amp)
- 4 AC plug inserts (US/ Europe/ UK/ Australia)
- Airline adapter
- Soft carrying case
- Quick Guide
- Animated manual CD-ROM
Featured video:
Customer reviews for Sennheiser MM 400
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Average review:
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Customer photos
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More details on the Sennheiser MM 400
Features & specs
| General | ||
|---|---|---|
| Fit Style | On-ear | |
| Earcup Type | --- | |
| Earcup Width x Height | 2.275" x 2.275" | |
| Noise-canceling | No | |
| Bluetooth | No | |
| Bluetooth Version | --- | |
| Single-earbud Operation | --- | |
| Mic For Taking Calls | Yes | |
| Voice Assistant Access | ||
| Amazon Alexa | No | |
| Google Assistant | No | |
| Siri | No | |
| Connectors | ||
| 3.5mm | Yes | |
| 1/4" | No | |
| Lightning | No | |
| 4.4mm balanced | No | |
| XLR4 balanced | No | |
| 2.5mm | No | |
| Other | None | |
| Specs | ||
| Frequency Response | 15-22,000 Hz | |
| Sensitivity | 107 dB | |
| Impedance | N/A | |
| Weight | 3.7 ounces | |
| Cord Length | 56" | |
| Parts Warranty | 2 Years | |
| Labor Warranty | 2 Years | |
Product Research
Features
Bluetooth Wireless Reception/Transmission: The Sennheiser MM 400 features Bluetooth v2.1 wireless reception and transmission with a built-in microphone for cable-free use with select Bluetooth enabled phones and audio devices. Supported Bluetooth profiles include A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile), HSP (HeadSet Profile), and HFP (Hands-Free Profile).
Note: Not all Bluetooth enabled audio devices will be compatible.
Controls: On the right ear-cup there are integrated controls for your connected phone or audio device. Audio controls include volume, skip forward or backward, fast forward or rewind within a song, pause, play, and stop. Phone controls include volume, accept call, reject call, end call, redial, voice dial, and mute.
Note: All control functions must also be supported by the connected device. The 2nd generation iPod touch, iPhone 3G, and iPhone 3GS support only the play, stop, and pause audio functions via AVRCP.
Battery Pack: The MM 400 has a removable Lithium-Polymer battery pack (3.7 volts DC/1.0 Wh) which provides up to ten hours of music playback or up to 20 hours talk time (phone). An AC adapter is included to charge the battery pack; charging time is approximately three hours. The headphones can also be charged using a computer's USB port.
Collapsible Design: These headphones feature a collapsible design with metal-reinforced headband to ensure portability and durability.
Cord & Adapter: The MM 400 will also work as wired headphones, useful when Bluetooth connection is not an option. The headphones come with a 56" mini-jack cable terminated by a 3.5mm connector for a wired connection. An in-flight audio adapter (dual mono 3.5mm) is included for added travel convenience.
Carrying Case: A nylon carrying case is included to protect the headphones during storage or transport.
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