Product Features:
<br />1. Allows you to conveniently answer calls or listen to music while doing sports
<br />2. The latest version V4.0
<br />3. Connect both phones at the same time
<br />4. Can be used as collar clip to wear
<br />5. It's easy to be stretchable
<br />6. Switch between Chinese, English 
<br />7. With the function of electric quantity voice broadcast
<br />Product Parameters:
<br />1. Bluetooth mode: stereo
<br />2. Bluetooth version: compatible with V4.0 + EDR 
<br />3. British CSR8615 chip
<br />4. Wireless frequency: 2.4GHz-2.48GHz
<br />5. Transmission power: Class 2
<br />6. Working voltage: 3.2 ~ 4.2V
<br />7. Working current: 
<br />8. Transmission distance: 10m
<br />9. Charging time: 1H-2H
<br />10. Calling time: about 4.5H
<br />11. The time for listening to music: about 3.5H
<br />12. Standby time: 75H
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