YYK-520 Single Rotatable Ear-hanging Business Bluetooth Earphone with Charging Box & Digital Display, Support Call & Redial The Last Call

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: 8mm diameter, 32 ohms
11. Microphone sensitivity: -42dB
12. Working temperature: -10-50 degrees Celsius
13. Input voltage/current of charging compartment: 5V/1A
14. Battery capacity of charging compartment: 400mAh
15. Weight: 74.5g

Packing list:
Charging compartment x 1
Charging cable x 1
Manual x 1
Headphone x 1
Ear cap x 2