1. Bluetooth version: 5.1
2. Communication distance: about 10 meters
3. Speaker size: 13mm
4. Speaker power: 5mw*2
5. Sensitivity: -42db+3db
6. Frequency range: 20Hz-20KHz
7. Music time: 4 hours
8. Battery capacity: earphone 30mah, charging compartment 300mah
9. LED display, clear at a glance
10. With life waterproof function
11. Ergonomic design, comfortable to wear
12. Intelligent noise reduction brings a clear call experience
13. Dual independent chips, dual channel transmission
