... , GPS), 1 only to the rear portion of the helmet Bluetooth headset, a total of 4 device, the otherCable connection 1 way ... only), 1 sets of hand controllerBRC-01, 1 only to the rear portion of the helmet Bluetooth headset, the other a wired connection ... of the premise must be handheld walkie-talkie with BMD-01 Bluetooth adapter, adapter and walkie-talkie connection, an PTT is mounted ...