Bluetooth 5.0 Wireless Connection The bluetooth smart glasses are equipped with a more stable bluetooth 5.0 chip, which provides longer use time, longer transmission distance, faster and more stable connection. It also has a wide compatibility and can be compatible with Bluetooth-enabled devices such as cell phones, PCs, tablets, etc. AI Intelligent Voice Control Built-in speakers and microphones, it supports AI intelligent voice control, you can easily activate "Siri". Open ear audio design lets you stay aware of your surroundings while enjoying music and making calls. Safer to use than in-ear headphones while driving, cycling, running or walking on the road. Water-Resistant IPX4 Design The bluetooth sunglasses provide favorable water resistance and can easily resist sweat and rain. It allows you to enjoy sports, music and calls free from harsh weather conditions. Ultra-Light Design The smart glasses body only weighs 32.6g, it is very light, comfortable to wear, foldable and easy to carry. It also comes with a glasses case for easy storage and protection of the glasses. Charging Method The smart glasses use a magnetic charger. You need to connect one end of the charger to the USB port, and the two wires at the other end are connected to the two sides of the glasses for charging. Please do not use glasses while charging. Long Battery Life Built-in rechargeable battery, 90mAh large capacity, low power consumption. It only takes 1.5 hours to fully charge, providing up to 240 hours of standby and 8 hours of audio or calls.