The Clipper GPS repeater has quickly established itself as the market leader in cockpit GPS repeaters. Typical of the Clipper range it boats large clear digits and simple operation. Installation coundn't be simpler with just two wing nuts to fasten the unit into the panel ans two wires to connect to the GPS. Technical Specifications: Standard 110mm case Super large high contrast LCD Four instantly accessable display screens Standard NMEA 0183 interface suits most Complete with weather cover and 10 meters of cableThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.