GPS Data/Memory Cards
GPS (global positioning system) is a navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver. Most GPS units require some sort of data or GPS memory card.
This is an awesome gadget. My hubby found it very easy to use and is very pleased with it.
Product works great.
This is the sort of item that you notice only if it doesn't work! This one works great. No complaints.