iGPS-500 is the optional GPS unit sold with Microsoft Streets & Trips 2007. It is based on the great SiRFstarIII chipset, so the receiver has very good sensitivity to weak satellite signals. However, due to its a bit smaller size (smaller antenna), you may find in side-by-side comparisons that the sensitivity is slightly lower in comparison to some other SiRFstarIII units.
It should work with iGuidance and many other software programs just fine.



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