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