Radio Transmitter; 1 Channel; Receiver Size (In.) 2-1/8 x 1 x 3-3/4; Voltage 9V DC; 318 MHz; For Use With (1) Door; Includes 9V Battery; Visor Clip

Radio Transmitter; 2 Channel; Receiver Size (In.) 2-1/8 x 1 x 3-3/4; Voltage 9V DC; 318 MHz; For Use With (2) Doors; Includes 9V Battery; Visor Clip