Features: 1.Blue Light Filter and UV400 Polarized Sunglasses Lenses: The blue light filter protects your eyes by reducing screen glare, reducing eye fatigue and making them feel fresh and focused while enjoying entertainment or work, while polarized replacement lenses protect your eyes from the sun. 2.Low Latency Audio: 60 millisecond bluetooth 5.0 connection delivers smooth, delay free sound that immerses you in an immersive experience without interruption by audio delays or skips. 3.Built In Microphone and Speaker: You can answer calls by hands free, thanks to a conxealed omnidirectional microphone built into its frame. 4.Support for Touch and Voice Application Compatibility: Changing music tracks, playing or pausing media, managing calls and activating your smartphone's voice application to connect to your favorite music station, all from the glasses' sleek touch interface. 5.More Than 5 Hours of Battery Life: So much mileage can be driven on a single charge that it never runs out during a long game. When folded up and not in use, it saves power by automatically turning off. specification:Item Type: Audio Sunglasses Product Material: PC frame,TR 90 front frame and TAC lens Weight: Approx. 245g / 8.64oz Glasses Color: Blue Battery: Polymer lithium ion battery (built in) Capacity: 120 mA Bluetooth Version: V5.0 and EDR Transmission Distance: Approx.10-15m/393.70-590.55in Frequency Range: 2402-2480mhz Charging Voltage: DC 5V Talk Time: 5 hours Charging Time: 1.5-2 hours Standby Time: 200 hours PackageList:1 x AudioSunglasses(Built In Battery) 1 x USB Cable 1 xCloth 1 x 1 xStorage Bag