1.Perfect combination of durable and fashion 2.Polarized lenses, offers anti-glare and ultraviolet protection 3.Auto switch to phone talking mode when making and receiving calls 4.With Previous/Next Song control, Volume Up/Down control 5.Bluetooth V4.1, support both headset and hands-free profiles 6.Built-in rechargeable lithium battery, comes with Mini USB cable 7.Not only can answer the call, but also used to listen music. Wireless Technology: Bluetooth 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. Specifications: Longest wireless range: 10 meters Talk time: about 3-4 hours Stand-by time: 100 hours Charging time: 1 hours Noise-signal ratio: 15 decibel resolution Frequency: 2.402GHz -2.480GHz Receiver sensitivity: 0DBM (degree: 11) Encryption length: 128bits Certificate Authentication: CE, FCC Storage temperature: 2060 degrees Compatible Models: All of devices which have the Bluetooth Function All of devices which have the Bluetooth Function, such as Tablet PC, Laptop, PSP, TV, Computer, etc. This bluetooth headset headphone sunglasses is the perfect combination of durable and fashion. You may wear it anytime anywhere, getting hands-free phone call. It has Dark gray Polarized lenses which can filter ultraviolet and protect your eyesight at the same time. Note: This glasses uses the Polarold Lenses, to protect the lenses, there are protective films on positive and negative lens, so you need to tear the protective film before use it. Package Content: Set1: 1 x Sunglass Bluetooth Headphone 1 x USB Cable 1 x User Manual Set2: 1 x Sunglass Bluetooth Headphone 1 x USB Cable 1 x Carrying Bag 1 x Cleaning Cloth 1 x User Manual