... TFT touch screen, 8cord ringer tone ZAD522 Functions: 10.4inch TFT color LCD display,Aluminum case; Flat screen ... calling, talking conversation & intercom w/ inside extension door phones, guard centers, Door releasing, monitoring according to signals received such as closing ... C~+70°C-25°C~+70°CAssurance humidity10%~95%10%~95%10%~95%Max extensions9999 Ext.9999 Ext.9999 Ext.Pixelnil420pixel420pixelFace ...