feature: It is very convenient to use and the wiring diagram is simple to connect. Up to 19 remote controls are supported. It can be connected with electric locks, lights, electric curtains, etc. to achieve remote control on, turn off lights, open and close curtains, etc. Ultra-small body, takes up less space. The working mode can be changed by itself: it can be switched to three modes: instant, switch and lock as needed. Learn to code: it can be used with any remote control of the same frequency, don't worry no more losing the remote control. (If the remote control is lost, just buy one to pair with the PCB.) Advantages: The remote control circuit switch has a control circuit on-off, replaces the key switch and the output is a relay contact switch (normally open type). Performance reference: 1. Output voltage = input supply voltage. 2. When using, the module will heat up, which is normal, no need to worry. 3. How long to hold the control down = how long to output power to the module. 4. Independent coding, multiple sets do not interfere with each other. 5. 360° control, can be controlled by partition. Switch module size: 21*11*5mm Remote control size: 6.1 x 2.9 x 1 cm. Package includes: 1 * remote control, 1 * switch module