<p><b>NikoMaku Motorcycle Helmet Bluetooth Headset <br> </b><br> <b>Long Working Time<br> </b>Stand-by time 70 hours. Working time 7 hours. Enough for your trip.<br> <br> <b>0.27 inches Thin<br> </b>The earpiece is only 0.27 inches thin. More comfortable wearing and more suitable in your helmet.<br> <br> <b>High Quality<br> </b>Much thinner, crystal clear stereo sound and efficient in power saving, these high-quality features will provide you an excellent user experience. <br> <br> <b>Wide Compatibility<br> </b>This headset can be almost connected with any Bluetooth-enabled devices. <br> <br> <b>Dustproof and Waterproof<br> </b>No matter you ride in the rain or on dusty streets, the dustproof and waterproof technology can protect the headset from these bad influences.<br> <br> <b>May not suitable for high speed driving.<br> </b><br> <b>Specification:<br> </b>Battery Capacity:150mAh<br> Bluetooth Chip Brand: CSR<br> Bluetooth Version: 4.0+EDR<br> Bluetooth Range: 20-30 meters<br> Frequency: 2.402-2.480GHz<br> Li-ion Battery: 3.7V/150mAh<br> Charging Voltage: DC 5V<br> Charging Time: About 1H<br> Working Time:7H<br> Standby Time: 70H<br> <br> <b>Package Included:<br> </b>1*Helmet Bluetooth Headset<br> 1*Charging USB Cable<br> 1*User Manual<br> 　</p>