Wireless receiver 1.Memory function 2.AC220V 3.4ch with case 4. ... the power shut Model No.: DL-CS4012LMDescription: Memory function Wireless receiver1. Product Detail:DL-CS4012LM is a 4CH ... 100m/300ft control range. Besides, this device has the function of memory, that if the power is cut off, it ... slowly, press the “Learn” button on the receiver board when the led is off, keep pressing until the ...