Universal Garage Door Receiver, Product Type Receiver, Includes Internal Antenna, For Use With Control Keypads, Overall Length 4 1/4 in, Overall Height 3 in, Overall Width 3/4 in, Material Polycarbonate, Color Gray, Compatible with Grainger Part Number 45GF96, Compatible with Manufacturer Model Number 811LM, PPK3M, PPLK1, PPLK1PH, Maximum Operating Temperature 149 Degrees F, Minimum Operating Temperature -31 Degrees F, Number of Buttons 3