. M.tipurpose wireless access controller for gate or door. 3 relays--access, obstacle & access/obstacle configurable;. Relays programmable from 1 sec-120 sec;. Super-heterodyne receiver for better range & sensitivity;. Up to 500ft radio range;. Supports 480 block-coded transmitters & 238 codes;. Supports 6 supervised MGT safety edge transmitters;. Keypad programming;. Operating freq: 318MHz