Easy to Use: The transmitter and receiver are pre-paired and tested. No setup is requiredsimply install and use. Widely Used: This remote switch is suitable for industrial control and security applications such as lights, motors, remote controllers, wireless security alarms, windows, lifting equipment, electric doors, door alarms, machinery in the security industry, and other wireless control systems. Signal: The wireless RF signal can penetrate walls, floors, doors, and windows. Multiple units can be used in the same location. Turn the receiver on or off from anywhere within a range of up to 164 feet (50 meters) in open area. Learning Code: Features a secure learning code system with low repetition rate and re-learn capability. Allows deletion of lost remote codes and programming of new ones for improved security and control. Buttons: 2 buttons Remote Distance: 20-50 meters Working Frequency: 433 MHz Max Load Current: 30A Encoding: Fixed code / EV1527 Color: Black Material: Plastic Package Contents: 1 x Remote Switch 2 x Remote Controls Note: Other items not included. Slight color variations may occur due to lighting and display differences. Measurement error allowance: +/- 1-3 cm.