... hold the top button down when you receive a phone call and you can use it to ... talking, release the button. It's exactly like a real radioComes with a 3.5mm jack spiral audio cable and ... Free, Retro style, radiation1) Talkback systems .There is a loud speaker and microphone inside, you can used transceiver ... AAA batteries, transceiver can hold 15 hours constantly.4)A hook on the back, you can use it ...