Bluetooth Stereo Beats Headphone Model:STN-11PRODUCT DEscriptION:Model:STN-11Style:Wireless bluetooth HeadphoneSupport:FM/Bluetooth/Wireless/Answer calling etc.Use distance:10mBattery capacity:250mAHStand-by time:120hrsTalk time:4hrsCharging time:2hrsBluetooth :Bluetooth V3.0+EDRUse:For Mobile PhoneFunction characteristics: Battery capacity:250mAh Certificates: CE,Website:http://www.smartcoolproduct.com,ROHS,FC Transmission distance: 10m Frequency Response: 2.4 GHz ~2.4835GHz ISM band. Charging Interface: Micro USB IP Grade: IP67