... 4 to 2.4835GHz ISM bandSensitivity85dBPC InterfaceUSB2.0Music FormatMP3 at WMAStandby timeup to 50 hoursMusic Playing Time7 hoursNormal ... iphone,ipad,PC,cellphones etc.4.Remote playback control function:play/pause, prev/next, volume +/-,redial,voice dial,call ... ruining your headset.8.Colorful wireless bluetooth headset.9.Powered by long lasting, rechargeable lithium batteries. 10.Impressive range ...