The GRD is a 1-Channel Gate Receiver designed for use with automatic gate operators or systems where a remote antenna is needed. The receiver uses the Delta-3 radio format, with 256 possible codes, set by dipswitch. Features are it uses Linears popular Delta-3 format, auto voltage sensing - no jumpers to set, single Form A (normally open) relay rated at 30 Volts AC/DC up to 5 Amps, and is supplied with whip antenna, three feet of coaxial cable, and bulkhead connector. Power: 12 - 30 VAC or 10.5 - 30 VDC. Dimensions: 3.625 x 5.25 x 1.5 inches. Warranty: 1-year.