Specifications
<br />(1)Bluetooth: The newest Bluetooth
<br />(2)Bluetooth V4.0 version, can be simple pairing safely.
<br />(3)It support recall(double click the call button to dial the latest phone number) and support answering call by Bluetooth.
<br />(4)Cortical earmuffs design, comfortable wearing, ventilation performance. 
<br />(5)Support Rapid Charging
<br />(6)Support TF(SD) Card
<br />(7)Frequency range: 20-20000Hz
<br />(8)Effective range: >= 10m / 33ft
<br />(9)Battery: 300 mAh(5-6h play)
<br />(10)Can Adjust the Band Length for Adult and Kids, folding for traveling and using easily.
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<br />Package Content:
<br />1*Bluetooth Headset
<br />1*USB Cable
<br />1*User Manual