Description of HV 800 Universal Wireless Bluetooth Stereo Headset Neckband Style Earphone Headphone for phonesfeatures:1. Charging voltage: DC5V 150mAh 2. Working current: 25-35mA 3. Bluetooth A2DP Working range: 10m 4. Output power: 35mW 5. Frequency range: 2.401-2.480GHz 7. Frequency response:

Description of HV 800 Universal Wireless Bluetooth Stereo Headset Neckband Style Earphone Headphone for phonesfeatures:1. Charging voltage: DC5V 150mAh 2. Working current: 25-35mA 3. Bluetooth A2DP Working range: 10m 4. Output power: 35mW 5. Frequency range: 2.401-2.480GHz 7. Frequency response: 20Hz-20KHz8. Working Time: Music/ HuaTong state 10 h10. Charging Time: 1h-2h 11. Talk time: 8-15 hours, play time: 6-10 hours12. Music Playing Time: up to 10 hours13. Frequency Response: 20 ~ 20000Hz14. Sensitivity: 80dB15. Impedance: 32 ohms16. peaker Power: 2 x 18mW17. Weight: 118g18. Color: same as picture