4.0 smart chip, Efficient transmission speed.
<br />Compact, ultra Light Design Stereo Bluetooth Headset, Portable And Easy To Carry.
<br />High-fidelity sound quality, Wireless songs enjoy
<br />Voice report number, low power remind,Connect/disconnect remind,Boot off prompts.
<br />Allows you to conveniently answer calls while driving.
<br />Long battery life, fast charging.
<br />Support WeChat, QQ voice calls,movie,
<br />Compatible For Almost All The Mobile Phones And Tablet PC, etc.
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<br />Package Contents:
<br />1 x Bluetooth Earphone
<br />1 x USB cable
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<br />Specification:
<br />1. Drive: 40 mm
<br />2. Impedance: 32 OHM
<br />3. Bluetooth version: Bluetooth v4.0 + EDR
<br />4. Power Level: CLASS II
<br />5. Output Power: 30mW
<br />6. Bluetooth distance: 10 meters barrier
<br />7. Frequency response: 20-20000 Hz
<br />8. Operating voltage range: 3.0V-4.2V
<br />9. Microphone sensitivity: -42dB
<br />10. Charging time is about 20 min 
<br />11. Dimensions: 28 nm*16nm*16nm
<br />12. Weight about 4g
<br />13. Talk time About 4 hours
<br />14. Music for about 2.5 hours
<br />15. The standby time is about 3-4 days
<br />16. Charging Power: DC5V Power Interface [the hole] (computer USB port, mobile phone charger, car charger)