This curly null modem cable is used to connect your GPS receiver to a field computer or real-time source. It is compatible with the GPS Pathfinder ProXH and ProXT receivers, GeoExplorer series handhelds (with the optional serial clip), GeoBeacon receiver, BoB receiver, Trimble Recon handheld, GIS TSCe field device, and the GPS Pathfinder Pro XR, Pro XRS, Power and Pocket receivers. Because it is curly, this cable provides a more robust and effective solution for connection in the field.