Smart Home 433Mhz AC85-220V 1CH Wireless Remote Switch Relay Receiver Transmitter Universal Remote Control Switch Module and RF Transmitter Remote Controls 1527

Features:
*Very convenient to use, simple wiring diagram connection way.
*Support remote control up to 19 pieces. It can connect to the electronic control lock, light, electric curtain, etc. So that it can remote unlock the door, close the light, open or close the curtain, etc.
*Super small body, and it occupies less space.
*The working mode can be changed by yourself: you can switch to momentary, toggle, latching three modes as you need.
*Learning pair code: it can work with any remote control with the same frequency, so you needn't worry about losing remote control any more. (If the remote control is lost, buy one and pair with the PCB board is OK.)