... JB-5000 Multi-apartment Intercom System1. Features: The system is applicable for single buildings. Besides the common ... Technical Parameter: 1) Display: 4 CRT/TFT-LCD, or 3.5'',5'',5.8'' & 7 TFT-LCD 2 ... ) Display: 420TV lines(B.W), or 300,000 pixels(color) 3)Working voltage:DC12V±10%(audio ... )Environment Temperature:-10~+55°c Multi-apartment Home Alarm System with 4 Bus Wires and 1 Video Cable ...