[Easy to Use ]We have made transmitter and receiver working and test it it,when you it & 39;t need to do anything ,just install it.[Widely Use]This remote switch used in industrial control and security fields, such as , motor, remote controller, 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, floors, doors or windows.You can use two or more units in the same place.You can turn on/ off the receiver with transmitter from any place within a distance(Max range is up to 164ft/50m with no obstacle).[Learning code] the Learning code has high-level security for low repetitive rate and re-learn mode, it can delete the code and re-learn a new code,when a remote control lost,So you could always control of it.Buttons: 2 Buttons Remote Distance: 20-50M Working frequency: 433mhz Max load current: 30A Encode: Fixed code / EV1527 code Colour:black Material:plastic Package Contents: 1 * Remote Switch 2 * Remote Controls Only the above package content, other products are not included.Note: and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.",