Features: 1. listening to the song correct, support songs and then call, 2. Caller ID, the last call back, all intelligent Chinese and English voice prompts, boot, pair, shut down the phone power will be low voice prompts; 3. Apple phone power display, you can always watch the headset power situation, do not worry about the headset no electricity to make your life worry; 4. One to two connections, can be connected to two mobile phones; 5. Bluetooth headset every time connected to the phone after the shutdown, and then open the Bluetooth headset will automatically connect back to the phone, but also more convenient; 6. Intelligent compatibility: support all with Bluetooth mobile phone, tablet, notebook, singing it, QQ music, movies, etc., all the mobile phone; Product parameters: 1. Drive: 15mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth v4.1 + EDR 4. Bluetooth use band: 2.4GHz 5. Power level: CLASS II 6. Output power: 30mW 7. Bluetooth distance: 10 meters barrier 8. Frequency response: 20-20000Hz 9. Operating voltage range: 3.0V-4.2V 10. Mitou sensitivity: -42dB 11. With A2DP / AVRCP high quality stereo audio transmission and remote control protocol 12. Powerful noise de-noising circuit (active noise reduction) 13. switch between Chinese and English (boot does not connect Bluetooth state, press the switch 2 times, hear the tone switch successfully) 14. Charging time about 1 hour (power indicator charging: red light, full power: red light off (blue light) 15. Product Size: Length 25MM. Width 15MM. High 35mm 16. Product net weight of about 5g 17. Talk time is about 4-5 hours 18 music time about 4-5 hours 19. Standby time is about 120 hours 20. The charging time is about 60 minutes 21. Battery capacity 60MAH 22. Charging power: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger 23. Compatible phone: compatible with Andrews, Apple, Microsoft, Saipan system with 99% of the Bluetooth mobile phone Package Include : 1* Headset