2400SYS wireless video system with 24db gain antenna. Offers up to 4 mile range. Comes with (2) receiver antennas: a rubber duck antenna (up to 1500 feet) and a 24db gain parabolic (up to 4 miles) plus power supplies. This is a four channel transmitter-receiver system operating in the 2.4 Ghz band. Stated ranges are for ideal line-of-sight applications. Obstructions will substantially reduce the range.