... 2.4G wireless headset for PC,TV,MP3,MP4 and other audio equipments, realized wireless networking talk This product is a wireless stereo headphone,adopting 2.4G ... from PC,also can realized SKYPE,MSN,QQ wireless network long-distance callUsing high quality microphone, ... about 8 hours Microphone:Microphone size:6mmSensitivity:-52dbImpedance:≤2.2kΩFrequency response: 75HZ-16KHZ Speaker:Speaker diameter ...