YYK-525 Simple Version Single Rotatable Earhook Noise Reduction Call Business Bluetooth Earphone without Charging Box

1. Bluetooth version: V5.0+EDR
2. Wireless frequency: 2.4GHZ
3. Support protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3
4. Transmission distance: 10m
5. Headphone battery capacity: 50mAh
6. Headphone charging voltage/current: 5V/1A
7. Play/talk time: about 4 hours
8. Charging time: about 1 hour
9. Standby time: 120 hours
10. Speaker impedance: diameter 8mm, 32 ohms
11. Microphone sensitivity: -42dB
12. Working temperature: -10-50 degrees Celsius