... (radio),1 Bluetooth adapter BMD-01 (GPS), the other a wired connection 1 way device.3, Bluetooth 2, 1 mobile phone ... helmet Bluetooth headset, the other a wired connection 1 way device.Two, implement the wired input source device:Can cable input 1 ... maintain radio time to hear you, then for walkie-talkie wired connection, but you hear at the same time, the other ...