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)