Bluetooth-compatible glasses speaker: dynamic drive, unique sound cavity design, avoid hearing impairment In-ear design helps you keep an eye on your surroundings, avoid danger and enjoy music Open solution: allows you not only to listening to music, answer calls, but also to hear notifications from glasses, while listening to the world around you The sunglasses have built-in noise-canceling microphones that allow you to make and receive calls Transmission distance: 33 feet (10 meters) Use Noise Canceling Microphone: This wireless Bluetooth-compatible 5.0 has wide compatibility. So these glasses are perfect for cycling, running, driving, boxing, fishing, playing basketball, shopping and other outdoor activities, you can easily make calls with sound. High performance: charging time is 2 hours, standby time is 6 hours, playing music for about 3-4 hours (depending on the volume and ), continuous talking for about 4-6 hours. IPX7 Waterproof Sunglasses: Our wireless Bluetooth-compatible 5.0 sunglasses are designed with good waterproof effect, which can easily resist sweat and rain. The glasses are perfect for sports, music and calls. Product Name: Smart Bluetooth Glasses Speaker type: dynamic speaker; Microphone: -40dB3dB; Compatible profiles: A2DP, AVRCP, , HFP; Transmission distance: 33 feet (10 meters); Battery: Rechargeable Li-ion 75mAh; Continuous playback: 3-6 hours (normal volume); Standby time: 10 days; Charging time: 2 hours; Waterproof grade: IP7; Bluetooth-compatible version: CSR5.0; Working temperature: -10C-+50C Humidity 0-90%; Colour:black+transparent type:D: E31-06(Anti-Blue) Material:PC+CTA+TR90+nylon Package Contents: 1 x Bluetooth-compatible glasses 1 x USB cable 1 x glasses cloth 1 x Bag 1 x Instructions in Chinese and English