1. Drive: 15 mm<br />2. 32 OHM impedance:<br />3. The Bluetooth version: Bluetooth v4.1 + EDR<br />4. Bluetooth: use frequency 2.4 GHz<br />5. Power levels: the CLASS II<br />6. The output power: 30 mw<br />7. Bluetooth distance: barrier-free 10 meters<br />8. Frequency response: 20-20000 hz<br />9. Working voltage range: 3.0 V to 3.0 V<br />10. Microphones sensitivity: - 42 db<br />11. Have A2DP/AVRCP high-quality stereo audio transmission and remote control protocol<br />12. A powerful noise denoising circuit (active noise control)，<br />13. Switch in both English and Chinese (not connect bluetooth boot state， press switch 2 times， even hear a chime switch success)<br />14. The charging time is about 1 hour (charging power supply instructions: red lights， full of electricity: the red light (blue light).)<br />17. Talk time about 4 to 5 hours<br />18 music time about 4 to 5 hours<br />19. About 120 hours standby time<br />20. The charging time of about 60 minutes<br />21. 60 mah battery capacity<br />22. The charging power supply: DC5V power interface 】 【 circle holes (computer USB port， mobile phone charger， car charger)<br />23. Compatible with mobile phones: compatible with android， apple， Microsoft， symbian with 99% of mobile phone with bluetooth function<br /><br />Specification<br /><br />Color: Black/Gold/White/Red/Rose Gold<br />Wearing type: In-ear with ear hook<br />Feature: Wireless Headphone<br />Function: Answering phone， Bluetooth， Microphone<br />Connectivity: Wireless<br />Connecting interface: Micro USB<br />Application: Mobile Phone， Sport<br />Power supply: Built-in rechargeable battery<br />Bluetooth: Yes<br />Bluetooth version: V4.1<br />Bluetooth mode: Hands free， Headset<br />Product weight: 5g<br />Package weight: 0.06kg<br />Brand: Unbranded/Generic<br />Wireless Technology: Bluetooth<br />Fit Design: Ear-Hook<br />Country/Region of Manufacture: Hong Kong<br />MPN: Dose Not Apply<br />UPC: Does Not Apply<br />Model: Bluetooth 4.0 Earphone<br />EAN: Does Not Apply