M-W8 Bone Conduction Digital On-Ear Single Ear Bluetooth Earphone1. Ergonomic design, long time use does not hurt the ear2. Bluetooth 5.2 intelligent low efficacy chip, smooth connection without lagging3. Power real-time display, check the power of the earphone at any time and anywhere4. HIFI technology, fully enclosed cavity leakage suppression5. No distinction between left and right ear, 180 degree rotation, you can switch between left and right ear at will6. IPX5 waterproof, outdoor fitness can also be used with confidence7. Voice reminder function, real-time report to you the status of the earphoneParameters:1. Bluetooth version: 5.22. Transmission distance: about 15m3. Battery capacity: 170mAh4. Charging voltage: 5V5. Standby time: 60 days6. Earphone weight: 15.2g7. Charging time: about 2 hours; battery life: about 12 hours8. Frequency: 20Hz-20KHz9. Impedance: 32 ohms10. Sensitivity: 85dBmW11. Size: 6.2 x 5.4 x 1.3cm