Features 1.BUILT IN SPEAKER AND MICROPHONE: Smart glasses are a combination of open Bluetooth headset, anti blue light glasses and sunglasses. Built in advanced speaker and microphone allows you to listen to clear music and make clear phone calls hands free. 2.VOICE CONTROL FUNCTION: Wireless speaker with smart assistant technology such as hands free phone calling and answering, easily connect to your favorite music stations (for Pandora, for iTunes, for Spotify, etc.), and easily speak to directions, weather and traffic updates. 3.ANTI BLUE LIGHT: Smart bluetooth glasses are anti blue light and UV400 UV resistant. Reduces visual fatigue and discomfort from prolonged use of smartphones, smartwatches, tablets, computer monitors and other devices. 4.COMFORTABLE AND WATERPROOF: Open ear smart glasses are lightweight, comfortable, sweat and water resistant. Computer glasses can be used in all occasion such as online meetings, classes, games, driving, exercise and outdoor activities. 5.MAGNETIC CHARGING: Smart glasses fit most women and men. Music glasses carry a 180mah battery that can be used for 6 hours of playback or phone calls and can be fully charged in 1 hour with the magnetic charging cable. specificationItem Type: Bluetooth Sunglasses Material: ABS Bluetooth Protocol: 5.2 Effective Distance: 15m / 49.2ft Sound Channel: Dual Speakers Stereo Lens Technology: Anti Blue Light, Blue Coating, Anti UV400 Ultraviolet Light Battery Type: 2 x 90mAh Lithium Ion Battery (Built In) Size: Approx. 148 x 49mm / 5.83 x 1.93in PackageList1 x BluetoothSunglasses 1 x Magnetic Charging Cable 1 x Wiping Cloth 1 x Storage Bag NotePlease allow some error due to manual measurement.