Bluetooth stereo A2DP headset for mobile phones and audio devices with AC charger. Simple to use with easily accessible answer/end button and volume control. Elegant and lightweight headset connects to your phone using Bluetooth wireless technology. Never miss your incoming phone calls again – switch between talking and listening to music with ease. Enjoy music in stereo and still be able to take your telephone calls from a Bluetooth handset hands free. Frequency: 2.4GHz-2.48GHz. Transmission power: Class2. Transmission distance: 10M. Operating voltage: 3.6V. Operating current: ≤ 35 mA. Standby current: ≤ 2 mA. Charging time: 2.5-3H. Listen music time: 8 H. Talking time: 9H. Standby time: up to 200H.