■  Mini model, placement in intercom system;

■  Code frequency:315Mhz/433Mhz;

■  Superheterodyne receive distance: 200m in open air, high stability; Long transmission distance; Preventing false alarm and easy after-sale service.

■  Dimension：27*45*32mm   

■  Red for positive, black for negative power. blue, white, yellow, green four groups respectively corresponding to four photoelectric relay output.