... lock model.Explanation:1):Self lock model: [For example 4ch wireless switch]Press remoter button A first time,the receiver relay ... /close,light ON/OFF2):Non lock model:[For example 4ch wireless switch]Press remoter button A always,the receiver relay ... Electric motor rotation positive and negative wireless control 3):Commutative lock model:[For example 4ch wireless switch] Press remote button A,the ...