1. , Bluetooth sunglasses with open-ear speaker system allow you to listen to your favorite music and everything around you. The high-definition microphone provides high-quality sound during calls, and the concealed omnidirectional microphone built into the frame makes Hear lifelike audio while others hear practically nothing 2. Polarized lens coating technology: UV400 polarized full protection lens with excellent color, sharpness and contrast polarized sunglasses lens can protect your eyes from sunlight, reduce eye fatigue and enjoy concentration.3.Long battery life- Rechargeable bluetooth sunglasses for up to 5.5 hours of continuous listening per charge. Musical sunglasses are fully charged in 1-2 hours. Standby time of 200 days, standby time of 200 days.4. The latest Bluetooth technology, pair your audio sunglasses with your device, listen to your favorite music and receive clear calls. Reliable Bluetooth range of up to 10-15M with low-latency audio: Its industry-leading 60ms Bluetooth connection delivers smooth, stutter-free sound, allowing you to immerse yourself in an immersive experience without audio delays or skips interrupted by the sound.5. Ultra-thin design: Ultra-thin thickness design, flexible material frame and very light weight like ordinary sunglasses, product weight is only 33g, exclusive fashion design, neat, neutral, very comfortable to wear when relaxing and exercising.6. Open-ear design, you don't need to put the earphones into the ear canal. Therefore, even if you listen to music all day, your ears will not feel sore. The revolutionary design frees you from the headset so you can keep an eye out for traffic, pedestrians, or whatever else you're experiencing while exercising outdoors. Perfect for driving, cycling, running and vacation travel.7. Replaceable lenses, the lenses are detachable, you can do goojodoq store to buy your favorite lenses to replace, the latest technology flexible lenses never have to worry about bending and breaking.Item model number: C8Product material: PC frame + TAC lensBluetooth version: V5.0+EDRFrequency range: 2402-2480MHZTransmission power: Class2Bluetooth support protocol: HFP/A2DP/AVRCPTransmission distance: 10-15 metersMusic playback time: 3-4H (80% volume)Talk time: 5HCharging voltage: USB DC5VCharging time: 1.5-2HStandby time: 200HBattery capacity: 3.7V/120mahWeight: 131g