M1S Bone Conduction Stereo Vibrator Speaker Bluetooth Earphones, M1S Red, M1S Green, M1S Black, M1S Pink1. Bluetooth version: V5. 3+EDR 2. Speaker type: bone conduction 3. Oscillator frequency: 20Hz 20KHz 4. Impedance: 32 ohms 5. Sensitivity: 85dB mW 6. Waterproof rating: IPX 6 7. Play time: about 7h 8. Battery capacity: 150mAh 9. Play time: about 6 8h 10. Standby time: about 150h 11. Charging time: about 1. 5h 12. Frequency band: 2. 4GHZ 13. Bluetooth protocol: A2DP1. 3 AVRCP1. 5 HFP 14. Weight: about 23g Features: 1. Dual silicon microphones, tuning

and access other features seamlessly

Charging time: 0

no need to worry about cleaning

Carton Size 54cm * 41cm * 30cm / 21

With its advanced features and user-friendly design

Loading Container 20GP: 315 cartons * 50 pcs = 15750 pcs

Bluetooth pairing and connection

5mm audio cable x1

+1 recommended focal length 70~120mm

charging must insert SIM card

long-distance shooting by journalists

delicate touch