... apartments.5.Cast aluminium panel, flush mount.6.Night viewing with IR LED.7.Easy to replace name tags ... Temperature: -40~70°c Indoor phones technical parameters: Display: 4 CRT/TFT-LCD, or 3.5'',5'',5 ... .8'' & 7 TFT-LCD Display: 420TV lines(B.W), or 300,000 pixels(color ... Temperature: -10~+55°cPics: Direct-call door phone system with built-in LED,Sony CCD camera and changable name tags ...