Wireless Remote Lamp Socket Professional Wireless Switch Manufacturer Free easy Installation Turn ON ... wireless switch]Press remoter button A always,the receiver relay is ON,release button A,the receiver relayis OFF, ... switch] Press remote button A,the receiver relay A is ON,the relay B/C/D is OFF;Press remote ... OFF;Press remote button C,the receiver relay C is ON,the relay A/B/D is OFF; Press remote ...