[Easy to Use] We have made transmitters and receivers that work together and tested them. Once you receive it, you don't need to do anything—just install it. [Broad Application Range] This remote control switch is used in industrial control and security areas, such as lights, motors, remote controls, wireless security alarms, windows, lifting equipment, electric doors, wireless door alarms, security industrial machines, wireless control systems, and other areas. [Signal] Wireless RF signal can pass through walls, floors, doors, or windows. You can use two or more units in the same location. You can turn the receiver on/off from any location within a distance (Maximum range is up to 164ft/50m without obstacles). [Learning Code] The learning code has high security for low repetition frequency and relearning mode. It can remove the old code and relearn a new one when a remote control is lost, allowing you to always control it. Buttons: 2 buttons Remote Control Range: 20-50M Operating Frequency: 433 MHz Maximum Load Current: 30A Coding: Fixed code / EV1527 code Color: Black Material: Plastic Packaging Contents: 1 * Remote Control Switch 2 * Remote Controls Only the above packaging contents are included; other products are not part of the package. Note: Lighting and different screens may cause slight color differences between the product in the image and the actual item. The allowed measurement error is +/- 1-3cm.