Open-Ear Sound Experience: Enjoy high-quality music without wearing the headphones. The glasses have built-in directional cavity speakers to bring you a stereo audio experience Polarized Lenses: UV protection coating blocks 99% of harmful UVA/UVB rays, effectively protecting your eyes from sun glare. Restore true colors visually and eliminate reflected or scattered light Lightweight Design: Weighing only 33g, lightweight and comfortable when wearing, with no pressure to wear, and suitable for different face shapes Wide Compatibility: Compatible with Bluetooth-enabled devices, including iOS/Android devices Easy to Control: After connecting to the mobile phone Bluetooth, you can use the glasses button to switch, play or pause music playback, answer or reject calls, and touch to wake up the voice assistant of the smartphone Longer Use Time: Built-in rechargeable 105mAh battery, can maintain clear calls for about 4.5 hours, can play about 4 hours of music, standby time is about 150 hours Waterproof Design: The sunglasses can still work normally under heavy rain. No need to worry about being damaged by rain or water drop Suitable Scenes: Great for outdoor activities such as cycling, fishing, driving, walking the dog, sunlight baths, etc Specification: Chip: Bluetrum 8925B Bluetooth-compatible version: 5.3 Wireless connection distance: about 40 feet (more than 12 meters) Speaker specifications: built-in 16.5mm round magnetic speaker Battery: 105mAh Charging method: 2-pin magnetic charging Charging time: about 70 minutes Standby time: about 150 hours Talk time: about 4.5 hours Play music time: about 4 hours Control method: button Frame material: PC Lens material: TAC+UV400 (UV protection 22%) polarized Template material: PC Waterproof level: IP65