- Bluetooth Stereo headphones with built-in microphone, compatible with any Bluetooth device - High-quality, rich sound. - Light weight, comfortable design for all-day listening - One key to pick up or end mobile phones, and allows hands free talk over mobile phones; - With voice control and able to choose songs to play by pre/ next button - Power Supply: Built-in rechargeable Lithium battery; charge battery via USB cable - Working Distance Range: = 10m