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