| * HS-20 2 place intercom* HS-40 4 place intercom- Potable 2 or 4 place intercom- Operates on one 9 volt battery or aircraft power- Low battery warning- Pilot isolate switch- Voice activated circuitry- Designed to be used with hand held transceiver- Push-to-talk switch is supplied with this unit- On/Off volume switch- Music in/record out jacks- Measures : 3.5"x4.3"x1.5"- Weight : 14 oz | 
