Stylish Bluetooth glasses, integrated digital wireless and world-class sunglasses technology integration .It is not only a pair of fashion glasses or a fine headset glasses Bluetooth headset, especially those who drive the best partner to support the call, music, Voice, self-timer. Technical Parameters: 1: Operating frequency 2.4GHz~2.480MHz 1: Compliant with Bluetooth V4.1 standard 2: Wireless connection range: 10 meters 3: Transmit power: Glass 2 4: Support Headset & Handsfree Profiles 5: headset built-in rechargeable lithium battery 150mAh: 6: headset Talk time: 6 hours; Standby time: 150 hours 7: weight only 50g, for a long time to wear without fatigue;