... controllerBRC-01, 1 only to the rear portion of the helmet Bluetooth headset, the other a wired connection 1 way device.Two ... , this button is also common, short press the front seat helmet Bluetooth duplex intercom, intercom function long press ptt.On the Weimaitong ... : http://www.motorfans.com.cn/bbs/f_207.htm Vimoto-V5s motorcycle helmet Bluetooth headset V5 upgrade edition Walkie talkie accessories