... 1):Self lock model: [For example 4ch wireless switch]Press remoter button A first time,the receiver relay is ON,press remoter button ... model:[For example 4ch wireless switch]Press remoter button A always,the receiver relay is ON,release button A,the receiver relayis OFF,the same ... 3):Commutative lock model:[For example 4ch wireless switch] Press remote button A,the receiver relay A is ON,the relay B/C/D ...