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Sennheiser MM 400-X

Availability: In stock

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Get call control, CD-quality sound and clear conversations, all wirelessly from one lightweight, folding Bluetooth® headset. A wired connection is available for in-flight use and charging options are flexible.

Sennheiser MM 400-X

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Full Description


The MM 400-X is a state-of-the-art on-ear Stereo Bluetooth® headset for multimedia mobile phones and computers. With one press of a button, you can quickly switch between calls and music delivered in superb stereo sound. The invisible high-performance microphone ensures that conversations are clear, making this headset the perfect all-in-one sound solution.

As an added benefit the MM 400-X enhances the latest apt-X®-enabled mobile phones and computers with supreme CD quality sound.


  • CD quality audio –Featuring the apt-X® codec, the headsets can connect wirelessly to any Bluetooth® apt-X® enabled devices, such as the new Apple computers and selected Creative and Samsung music products

  • Wireless freedom – Bluetooth® 2.1 guarantees hands-free convenience without wires and the advanced A2DP profile for Stereo Bluetooth® delivers optimized hi-fi stereo sound

  • Invisible microphone – with high-performance sound quality for clear conversations

  • Direct cable option – for use on airplanes, with an airline adapter included

  • Easy headset controls – in one intuitive cluster

  • Sennheiser sound quality – hi-fi headphone drivers ensure superior dynamic range, detail and excellent bass

  • Wearing comfort – padded ear-cushions provide an excellent soft fit, even on long trips

  • Easy-2-GO – the headset folds into a compact bundle for travel and storage, while the headband is metal-reinforced for durability

  • Flexible – replace the battery with a spare on long trips – or recharge it via the USB port on your laptop or the supplied lightweight wall charger with different plug fittings for Europe, the USA, the UK and Australia

  • Connect everywhere – to mobiles, laptops, MP3 players, or in-flight entertainment systems with an all-in-one headset solution

  • Peace of mind – thanks to the 2-year international warranty

What's in the box?

  • MM 400-X Bluetooth® headset
  • USB wall charger for US, EU, UK and AU
  • USB charging cable
  • In-flight adapters (3.5mm double mono jack)
  • Audio cable
  • Carry case
  • Quick set-up guide
  • User manual


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  • Color
  • Connector
    3.5 mm Jack, straight
  • Supported Profiles
    A2DP + AVRCP + HSP + HFP
    • Supported Profiles
      Codec: SBC, apt-X®
    • Ear coupling
    • Transducer principle
      Closed acoustics
    • Weight
      105 g
    • Charging time
      3 h
    • Listening time
      10 h
    • Technology
      Bluetooth® Version 2.1 + EDR
    • Talk time
      20 h


  • Frequency response (microphone)
    100 – 10000 Hz
  • Pick-up pattern


  • Frequency response (headphones)
    15 - 22000 Hz
  • Sound pressure level (SPL)
    107 dB
  • THD, total harmonic distortion
    < 0,1% à 1 kHz