Fangrui Product Details 1. Gl20 Digital Single-ear Rotating Universal Bluetooth Earphone 2. Bluetooth Version: 5.3 3. Transmission Distance: About 10m 4. Battery Capacity: 200mah 5. Charging Port: Type-cusb-c 6. Use Time: About 30h 7. Standby Time: About 300h 8. Charging Time: About 20min 9. Impedance: 32ohm 10. Frequency: 20hz-20khz 11. Sensitivity: 85dbmw 12. Waterproof Rating: Ipx 5 13. Weight: About 14g 14. Size: Approx. 7.5 X 4.5 X 1cm 15. Features: 16. Caller Voice Announcement, The Headset Can Clearly Identify The Calling Party Number, The Call Is More Convenient To Connect, Safer Driving 17. Built-in Dual Noise Reduction System, Intelligent Noise Filtering, Reduce Interference When Talking, So That Communication Is Clearer 18. Hanging Ear Design, Comfortable To Wear, Firm And Not Easy To Fall 19. Semi-ear Low Wear, Better Sound Transmission, More Clearly Hear The Sound Of The Surrounding Environment, Making Driving Safer 20. Led Lcd Digital Display, Easy To Understand The Power Usage 21. Tight Design, Effective Prevention Of Rain And Sweat Erosion, Using Easy-to-clean Material 22. Bluetooth 5.3 Chip, Stable Transmission Without Lag, Low Latency 23. Button Design, To Prevent Accidental Touch