Retekess Case of 4,Retekess TW104 Intercom Speaker,Bank Window Intercom,Full Duplex,Dual Way Counter Intercom System for Business,Retail Store,Clinic,School

* Clear two way sound;window speaker intercom system adopts full duplex technology with great sound transmission; 3W Main sound and sub sound signal output;It also adopts a 4 core high-strength aluminum foil shielded wire for less signal interference * Durable use;2 way window intercom use aluminum alloy panel;There is also a metal tube to protect the foil shielded wire; more sturdy; It can be installed in a commercial ticket window to hear customers better * Recording Function;There is 3.5mm jack recording in the main station;So it support to connect external recording device; So it works very well in a small business area with a window barrier * Knob Voice Adjustment; Bank window intercom system has the ability to adjust the volume on the both sides; And knob design can be more convenient to operate; Less static noise or hollow sounding * Easy to set up; it is really easy to use and setup just you have to plugin and it work; You can use it at check cashing place or groceries store; No need to use sign la...