This item powers on by either the 12v adaptor or by battery. All other functions are untested and are not guaranteed to work. It has an ICOM adapter cord for a ICOM A-20 or A-21 Radio (Radios not included). It comes with 3 PTT (Push To Talk Switches) with Velcro fastening. It comes with a cigarette lighter DC adapter.
2 user aviation pilots aircraft intercom with 3x PTT velcro fastening switches.