[Easy to Use] We have made the transmitter and receiver work together and test it before shipping, when you get it, you don't need to do anything, just install it. [Widely Used] Remote switch is used in industrial control and security fields, such as light, motor, remote control, wireless security alarm, windows, lifting equipment, electric doors, wireless door alarm, security industry machine, wireless controller and other fields. [Signal] Wireless RF signal can pass through walls, doors or windows. You can use two or more units in the same place. You can turn on/off the receiver with the transmitter from any place within a reliable distance (the maximum range is up to 164ft/50m without obstacle). [Learning Code] The learning code has high-level security for its low repetition rate and re-learning mode, it can delete the old code and relearn a new code, when a remote control gets lost, so you can still control . Buttons: 2 buttons Remote Distance: 20-50m Working Frequency: 433mhz Max