Specifications 
 The device is powered by 12 volts direct current.
Typical power sources include:
12V adapters
Batteries
Vehicle power systems
Wireless Remote Control
A handheld transmitter (the remote) that sends a radio signal to control a device without wires.
Pressing a button sends a coded RF signal to the receiver.
Single-Channel
The receiver controls one output only.
This means it can:
Turn one device ON/OFF
Or control one circuit (not multiple independent outputs)
Relay
An electrically operated switch that lets a low-power signal control a higher-power load safely.
The relay can switch:
AC or DC loads
Lights, motors, pumps, locks, alarms, etc.
Receiver
The module that:
Listens for the 433 MHz signal
Decodes the remote’s command
Activates the relay when the correct signal is received
RF (Radio Frequency) Switch
A switch controlled by radio waves instead of physical contact.
It allows remote ON/OFF control from a distance.
Applications
Garage doors
Home automation
Lighting control
Security systems
DIY electronics projects