... ,8ch,9ch,10ch,11ch,12ch,13ch,14ch and 15ch wireless remote control switch,AC90v~AC270v or DC6v~12v voltage working circumstance,100m ... ,the third is commutative lock model.Explanation:1):Self lock model: [For example 4ch wireless switch]Press remoter button A first time,the ... /close,light ON/OFF2):Non lock model:[For example 4ch wireless switch]Press remoter button A always,the receiver relay is ON ...