GS02 Smart Glasses, Support Voice Assistant Bluetooth Call Remote Control Photography About Product: 1. Lens: UV-400 Polarized lens 2. Speaker type: dynamic speaker 3. Microphone: -40dB±3dB 4. Compatible profiles: A2DP, AVRCP, HSP, HFP 5. Transmission distance: 33 feet (10 meters) 6. Battery: Rechargeable Li-ion 75mAh 7. Continuous playback: 3-6 hours (normal volume) 8. Standby time: 10 days 9. Charging time: 2 hours 10. Waterproof grade: IPX5 11. Bluetooth-compatible version: CSR5.0 12. Working temperature: -10°C-+50°C Humidity 0-90% Functions: 1. Bluetooth-compatible glasses speaker: dynamic drive, unique sound cavity design, avoid hearing impairment 2. In-ear design helps you keep an eye on your surroundings, avoid danger and enjoy music 3. 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 4. The sunglasses have built-in noise-canceling microphones that allow you to make and receive calls 5. Transmission distance: 33 feet (10 meters)