External USB GPS Receiver Waterproof GPS Receiver with magnet mount, 5 foot USB cable.

• SiRF Star IV High Performance GPS chipset
• High sensitivity (Tracking Sensitivity: -163 dBm)
• Support NMEA 0183 v3.0 data protocol
• Built-in SuperCap to reserve system data for rapid satellite acquisition
• Super-cohesive magnet for mounting on the car
• USB interface connection port.
• Software to convert the USB port into a virtual COM port so it can work with these and most any other NMEA compliant mapping software