The Skylink Keyless Entry Transmitter is to be used with the Skylink Garage Door Receiver. Easy to program, this entry transmitter will allow access to your garage via a personal access code. Easy to install with two screws. Long life Lithium batteries included. Personal access codes for maximum security. Backlit keypad. Short beep when buttons are pressed. ABS UV plastic case. Weather resistant design. FCC/IC approved.