GlobalSat MR-350P-S4-White-1Hz Serial GPS Receiver (White) Requires USB Cable Set (BR305-USB8) or RS232 Cable Set (BR305-RS232) to interface to your PC or Mac. Very high sensitivity (Tracking Sensitivity: chipset -163dBm) SiRF Star IV high performance GPS Chipset Supports NMEA 0183 V3.0 (GGA, GSA, GSV, RMC) Built in Super Cap to reserve system data for rapid satellite acquisition Built in patch antenna