[Easy to Use] We have made the transmitter and receiver work and tested it, when you don't need to do anything, just install it. [Wide Application] This remote switch is used in industrial control and security areas, such as lighting, motors, remote control, wireless security alarm, windows, lifting equipment, electric doors, wireless door alarm, security industrial machinery, wireless controller and other fields. [Signal] Wireless RF signal can pass through walls, floors, doors or windows. You can use two or more devices in the same place. You can turn on/off the receiver with the transmitter from any place within a distance (Maximum range is up to 50 meters without obstacles). [Learning Code] The learning code has a high security level for low repetitive frequency and re-learning mode, it can erase the code and learn a new code, when a remote control is lost, so you can always have control over it. Buttons: 2 buttons Remote distance: 20-50M Working frequency: 433MHz Maximum load current: 30A Encoding: Fixed code / EV1527 code Color: black Material: plastic Package contents: 1 * Remote switch 2 * Remote controls Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.