Product Description: • Bluetooth version :V2.1 + EDR compliant V1.0/V1.1/V1.2/V2.0 • Bluetooth Mode :Hands free/Headset/AV/A2DP • Radio Frequency: 2402MHz-2480MHz • transmission power: Class2 • transmission range: 10M • charge voltage :5V/500MA • Talk time ≥ 4H • Standby time ≥ 100H • Operating voltage: 3.6V-4.2V