generally, a telephone system is the best at this ... when you need a wireless intercom system that is battery operated, there is really ... they did not want to run a wire that far so ...

it consumes very low current and is fully battery operated. ... the link telephone intercom every home should have one! ... events (providing you can scrounge enough 4 wire ...

... automatically turns off •battery or dec power ... aplem1dls ez# 060492 handsfree color intercom kit •vox or push-to-talk operated ... turn on when door calls in •simple 2-wire ...