talk though glass intertcom

MY-E361 talk though glass intertcom 1.Usage:Say the bank staff use the master station to talk with guest .and the guest use the substation can talk with bank stafftoo . 2.Installation:the master station instill in the working place and the sub station out of the working room.Just one wire connection between the master station and substation. 3.Applicaton: bank ,stock office,hospital ,post office ,Box office ,Ferr charge station etc 4. Feature : Full metal jacket,elegance,aesthetic Hands free two-way talkback automaticity Micro computer controled circuit thoroughly avoid echo and squeal problem. Adopt high-powered mic,elegant appearance,voice is lifelike, clear;the volume of master station and substation can be adjusted separately by oneself; Easy installation ,only one wire for connecting master station and substation Have output for recording, can connect record equipment external. Technical Parameters Working voltage:DC12V Working current:350mA Environment :- 10°c 60°c