[Easy to Use] The transmitter and receiver are pre-paired and tested before shipment, so no additional setup is required—simply 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, wireless door alarms, security machinery, 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 any position within a reliable range of up to 164ft (50m) in open area. [Learning Code] Features learning code technology with high security due to low repetition rate. Supports re-learning mode to erase old codes and program new ones, ensuring control even if a remote is lost. Buttons: 2 Buttons Remote Distance: 20-50m Working Frequency: 433MHz Max Load Current: 30A Encoding: Fixed code / EV1527 Color: Black Material: Plastic Package Contents: 1 x Remote Switch 2 x Remote Controls Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations between the image and actual product color. Measurement error allowed is +/- 1-3cm.