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Wearing Bluetooth Sunglasses ocnNecessary for travel,business or tourist driving,outdoor finishing,outdoor cycling. Intelligent Assistant TechnologyHands-free phone calls and answers, easily call voice assistants to open your favorite music stations, broadcast weather conditions, etc. Touch Controlopen both devices search and concect the devices "TWS-F",an easy and stable pair within 10 meters away;touch connection,touch button control for power-on,power-off and other functions. Bluetooth 5.3 Connectivity Using Bluetooth 5.3 technology, low Bluetooth latency 60 milliseconds, providing smooth audio.smartly compatible with all kinds of Iphone and Android mobile phones, which makes the connection faster and more stable, so you will never worry about Bluetooth interruptions again Quality BatteryConsidering the user's long term experience, Smart Glasses are powered by a high quality battery, which takes only 2 hours to fully charge and can be used for up to 4 hours of continuous playback, which is both durable and safe.IPX4 WaterproofIt has good waterproof effect and can easily resist sweat and rain. You can also take care of music and calls while out running, driving, and other sports. After-sales Service You can use them according to the instruction manual in the package. If you have any questions during use or product quality issues, please be sure to contact us and we will provide you with satisfactory answers and solutions as soon as possible.