nikomaku motorcycle bluetooth headset helmet headphones bluetooth helmet speakers earphone intercom for helmets wireless headphones with microphone sound system for motorcycle 0.27 silm nikomaku <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>