Window intercom kit

Hands free two-way talkback full automaticity. 1.Full metal jacket,elegance,aesthetic                                                                               2.Hands free two-way talkback full automaticity                 3.Micro computer control circuit with squelch function; can thoroughly solve echo and squeal problems.4.Adopt high-powered mic,elegant appearance,voice is lifelike, clear;the volume of master station and substation can be adjusted  separately by oneself;5.Easy  installation ,there is only one wire for connecting master station and substation,the volume of internal and external can be adjusted by separately.                                       6.Have output for recording, can connect record equipment external.                                                       7.Widely use at any window internal/external intercom,the place which difficult to talk. Dimension of External substation:95×85×20mm