1. High Quality Stereo Bluetooth sport earphone、 Provides you a good enjoyment of beautiful music2. Bluetooth V4.1 is the most advanced Bluetooth technology、 which is more convenient、 stable and faster when it connects with other Bluetooth-enabled devices3. Comfortable、 behind the neck design4. Waterproof function、 fit your running and other sports5. Built in high performance rechargeable battery、 Long Talking Time and Standby Time6. One button to answer call、 built-in microphoneSpecifications:Model: BH-M56Bluetooth Version: Bluetooth V4.1Signal to noise: －85 dBPower: 3-5mWMusic playing time: up to 8 hoursTalking time: up to 8 hoursStandby time: 300 hoursSpeaker size: Φ13mmDimension: 152*134*50mmColor: BlackPackage includes:1* Bluetooth headset1* USB cable2* Manual