100% Brand New. Material: ABS & PC Wireless Technology: Bluetooth Follows the rule of Bluetooth V2.1 version Black Polarized lenses which can filter light and protect your eyesight Fashionable design with foldable eyeglasses. Earphones built directly on to the frame， and can be adjusted for comfortable fit. The wireless set aside to answer phone calls Flip-up Glasses Use of the network for remote wireless two-way conversation With this Bluetooth Sunglasses， you can enjoy your handfree holidays. Built in chargeable 120mAh lithium battery This is a wireless Bluetooth mono headset sunglasses. Longest wireless range: 10 meters Talk time: 6 hours Stand-by time: 150 hours Charging time: 3 hours Noise-signal ratio: 15 decibel resolution Frequency: 2.402GHz -2.480GHz Receiver sensitivity: 0DBM (degree: 11) Encryption length: 128bits Certificate Authentication: CE， FCC