[Easy to Use ]We have made transmitter and receiver working collectively and verify it deliver it,when you 't deserve to do something ,just install it. [Widely Use]This remote substitute used in advertisement management and security fields, resembling light, motor, distant controller, wi-fi safety alarm, windows,lifting equipment, electrical doors, wireless door alarm,security industry mechanical device , wi-fi controller, and different fields [Signal]Wireless RF sign can pass through walls, floors, doorways or windows. You can use two or more units within the identical place. You can flip on/ off the receiver with transmitter from anyplace within a reliable distance(Max range is as a lot as 164ft/50m with no obstacle). [Learning code] the Learning code has high-level security for its low repetitive commission and re-learn mode, it'll delete the old code and re-learn a fresh code,when a remote control get lost,So it's best to constantly management 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 equipment content, diverse merchandise are not included. Note: Light and sundry exhibits can cause the color of the item in the photo just a little diverse from the real thing. The dimension allowed error is +/- 1-3cm.