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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
Carrying Case: A nylon carrying case is included to protect
the headphones during storage or transport.