• Allow Communications among 4 users
• Power supplied by *9-Volt Battery or an external *cigar lighter wire
• Build-in two PJ-jack plugs which are compatible with general aviation aircrafts
• The input jack allows you to supply the cockpit with music**
• The output jack allows you to record your radio/cockpit communications**
• Squelch knob included for the mic-sensitivity adjustment
• PTT button would authorize only the pilot and co-pilot to use the radio
• Pilot can isolate the passenger conversations and focus on the radio talks with tower by just one click

* Battery and cigarette/cigar lighter wire NOT included.  ** Other electrical appliances are required.