Universal Wireless Stereo Bluetooth BH-02 Headset for ALL BLUETOOTH DEVICES Bluetooth version:BLUETOOTH V. 2.1+EDR SUPPORT: HSP, HFP, A2DP and AVRCP Frequency band: 2.4GHz~2.4835GHz, ISM Band Talk/ Standby time: Up to 11 hours Power Supply:5 V DC,100~240V AC adapter Operation Temperature:10~55