Nova IV super high-sensitivity heterodino four-zone wireless receiver. It can be connected to any alarm center. Accepts signals of up to 4 remote control transmitters in each of the 4 zones, directly or by repeater (16 transmitters in total). Output of four zones by relay contact. Signal output by relay contact for tamper, low battery, supervision failure and interference. Selectable alarm monitoring time of 3h or 8 h. Memory reading of 10 events. Communication mode for installation verification with signal quality indicator. Internal buzzer for correct installation test. Separate LEDs for transmitter and event identification. 12 Vdc power supply.