[Easy to Use ]We have made transmitter and receiver working together and check it carry it,when you 't should do anything ,just set up it. [Widely Use]This remote substitute utilized in business leadership and safety fields, akin to light, motor, distant controller, wireless safety alarm, windows,lifting equipment, electrical doors, wi-fi door alarm,security industry machine , wi-fi controller, and other fields [Signal]Wireless RF signal can struggle through walls, floors, doors or windows. You can use two or extra items in the identical place. You can turn on/ off the receiver with transmitter from anyplace inside a competent distance(Max vary is as much as 164ft/50m and not using a obstacle). [Learning code] the Learning code has high-level security for its low repetitive charge and re-learn mode, it's going to delete the old code and re-learn a brand new code,when a handheld remote control get lost,So it's best to always leadership 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, different merchandise aren't included. Note: Light and diverse exhibits can cause the colour of the object within the photo considerably various from the genuine thing. The length allowed error is +/- 1-3cm.