Digital remote-control “Receiver” 24V A.C. Security code setting 1024 combinations. Operating distance 120 ft. (36 meters – This distance may vary depending on local conditions). “Click feeling” transmitter button and L.E.D. indicators on both transmitter and receiver confirm successful operation. Frequency 313 Mhz. D.O.C. approved. Certificate No. K303. Can be applied to any style of garage door operator.