) Bluetooth chip and Bluetooth version: V4.1 + EDR 2) Bluetooth protocol: A2DP AVRCP HFP HSP 3) Battery: 3.7V 75mAh 4) The battery model: 501515 5) Charging power: 5V / 120mA 6) Transmission distance: accessibility 10m 7) Frequency: 2.4GHZ 8) Talk time: about 5-6 hours 9) songs time: about 6 hours 10) Standby time: about 260 hours