INTRODUCTION: The spectacle frame is ultra-thin and fashionable. And it's easy to replace the lenses to meet customer's mind in optical shop. Features: 1). On-line chat through Bluetooth wireless transmitter. 2). Support headset, handfree profile 3). Redial the last call, Reject call. 4). Volume adjustable. 5). LED indicates connection. 6). Faster connecting, clear sound, anti-interference Specification: 1) BT protocol: Version 2.0 2) Frequency: 2.4 GHz 3) BT range: 10meters. 4) Net weight: 48g 5) Power supply: DC3.7V/60Ma 6) Working volt: 3.7V 7)Battery: Rechargeable Li-Ion battery Talking time: Up to 8 hours Standby time: Up to 150 hours Chargeing time: About 2 hours. Accessories: 1). USB charging line. 2). Glasses box 3). Glasses cloth 4). User guide.