Features: 1.UV400 Polarized Sunglasses Lenses: Its blue light filtering can reduce screen glare to protect your eyes, reduce eye fatigue, and make them feel fresh and focused when enjoying entertainment or work, while polarized replacement lenses can protect your eyes from the sun. 2.Low Latency Audio: Its industry leading 60 millisecond Bluetooth 5.0 connection provides smooth, non caton sound, allowing you to immerse yourself in an immersive experience without interruption due to audio delay or skipping. 3.Built in Microphone and Speaker: You can answer the phone hands free, thanks to the built in concealed omnidirectional microphone in its frame. 4.Support Touch and Voice Assistants: The touch interface of glasses includes changing music tracks, playing or pausing media, managing calls and activating the voice assistants of smartphone to connect to your favorite music stations. 5.Battery Life More Than 5h: One charge can drive so many miles that it will never run out during a long game. When it is folded and not used, it will automatically close to save power. specification:Item Type: Smart Bluetooth Glasses Material: PC Frame, TR-90 Front Frame, TAC Lens Weight: Approx. 243g / 8.6oz Battery: Polymer Lithium Ion Battery (Built in) Battery Capacity: 120ma Bluetooth Version: V5.0+EDR Transmission Distance: 10-15m / 393.7-590.5in Frequency Range: 2402-2480MHZ Charging Voltage: DC 5V Talk Time: 5 hours Charging Time: 1.5-2 hours Standby Time: 200 hours PackageList:1 xSmart Bluetooth Glasses 1 x USB Charging Line 1 xClean Cloth 1 x Manua 1 x Storage Bag