Remax Rb 660hb Bluetooth Headphone

1. Bluetooth version: Bluetooth V5.0 2. Support protocol: A2DP, AVRCP, HSP, HFP 3. Bluetooth distance: more than 10m 4. Working voltage: 3.3-4.2V 5. Speaker impedance: 32 ohms 6. Speaker power: 50mW 7. Battery specification: 300mAh 8. Charging time: 2 hours 9. Talking time: more than 10 hours 10. Music playing time: more than 10 hours 11. Standby time: 300 hours 12. Material: plastic + metal 13. Bare metal weight: 190g 14. Bare metal size: 177x91x195mm.