Wireless stereo headphone,adopting 2.4G RF technology, realized SKYPE,MSN,QQ wireless network long distance call. This product is a wireless stereo headphone, adopting 2.4G RF technology.RF frequency:2.4GHZ ISM BANDSupport system:Win2000,win xp,win vista,Win7Pairing mode:Automatical,LED indicateFrequency Response:20Hz-20KHzReceive distance:about 10 meters (open space test)Speaker input power: ...