The Linear Delta 3 GRD-2 DNR00102 2-channel gate receiver is designed to be used with automatic gate operators that require a remote antenna. This versatile, two-channel receiver can operate a combination of two gates, one gate and an obstacle sensor, or a similar variation. You can even use one channel to open a gate and another to close it for added security. The DNR00102 receiver uses the Delta-3 radio format and features 256 possible codes for each channel, which you can set by dip switch. With built-in auto voltage sensing, there are no jumpers to set; it has two Form A relays rated at 30 volts. It comes with a whip antenna, 3 feet of coaxial cable, and a bulkhead connector, so you have everything you need to start using it right out of the box. Dimensions: 3.625 inches by 5.25 inches by 1.5 inches Two Form A relays rated at 30 volts AC/DC up to 5 amps each Power: 12 – 30 VAC or 10.5 – 30 VDC