The PMB-688 GPS module provides the highest performance with a SiRFstarIII chipset and integrated patch antenna plus an MMCX connector for our external GPS antenna, sold separately. See our GPS Comparison Chart to evaluate this model side-by-side with the very similar PMB-648 and the low cost PMB-248.

The PMB-688 GPS features 20 parallel satellite-tracking channels for fast acquisition of NMEA0183 v2.2 data for robotics navigation, telemetry, or experimentation. There is a built-in patch antenna as well as a connection for an external one; rechargeable battery for memory and RTC backup; cable for power, and TTL connection.