1. Bluetooth + MP3 function support stereo music playing, phone calling...

2. Support all audio devices that have Bluetooth capability, such as, cell phone ,tablet PC, laptop, computer etc.

3. 3.5mm audio jack, provides a simple wired connection of a variety of devices without Bluetooth.

4. Allow you to answer or reject phone calls anytime and anywhere.

5. Charged via USB, rechargeable battery, convenient and practical.

6. Good quality, foldable design and adjustable length hinges, very comfortable to wear and easy to carry.