With non-slip on the base and its compact design, the BU-353 is completely self-contained and waterproof. It incorporates the latest SiRF Star III GPS chipset and a 20-channel active patch antenna so you receive the highest degree of GPS accuracy.

Technical Information:
SiRF Star III High Performance GPS chipset
High sensitivity (Tracking Sensitivity: -159 dBm)
Extremely fast TTFF at low signal level
Support NMEA 0183 data protocol
Built-in SuperCap - rapid satellite acquisition
Built-in patch antenna.
Cohesive magnetic for mounting on the car
USB interface connection port.
Waterproof and non-slip on the bottom.
LED indicator for GPS fix or not fix.
WAAS / ENGOS is supported.