Docooler DC 4CH Channel 433Mhz Wireless RF Switch Long Wireless Remote Control Switch DC12V RF Relay Receiver Module Toggle Switch 1527 Chip Smart Home Automation (2 & 1 Receiver)

*Very convenient to use, simple wiring diagram connection way. *Support remote control up to 16 pieces. It can connect to the electronic control lock, doorbell, garage door, , electric curtain, household appliances, motor control, etc. So that it can remote unlock the door, close the , open or close the curtain,etc. *The Remote Control four buttons could respectively copy four different types of chips, that is a remote control can operate four different types of facilities. *Th