1.the smallest Bluetooth Headphone 2.Talk time:20h; Standby:100h 3.CE,FCC,BQB,ROHS ... ,HFP,A2DP,AVRCP 5.Available range:10 The newest Wireless Bluetooth Headphone for both ears Features of bluetooth: * High Quality Blutooth ... EDRTypeStereo headphone with internal micOperation Distance10mRange of Frequency2.4 to 2.4835GHz ISM bandSensitivity85dBPC InterfaceUSB2.0Music FormatMP3 at WMAStandby timeup to ...