1) Multi-function Wi-FI wireless headphone 2) Built-in Microphone, FM, HI-FI stereo sound 3) ... audio chat (built in Microphone at the transmitter) White color Wireless headphone; Motile, portable, Use for mmultimedia PC, etc. Operation distance up ... /N Ratio> 70dB> 70dBPowerBuilt-in chargeable 150mAH lithium batteryworking5 hours Wireless Headphone w/Volume Control Mute Feature, 2.4GHz (DA601)