... function, GPS's voice can be heard, if want to maintain radio time to hear you, then for walkie-talkie wired connection, ... headset volume, long press end number redial.Six, increase the walkie-talkie wireless PTT function:The function of the premise must be ... handheld walkie-talkie with BMD-01 Bluetooth adapter, adapter and walkie-talkie connection, an PTT is mounted on ...