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This product generally does what I expected it to do. However I also wanted to get altitude measurements and they didn't seem to make sense. Then I noticed an acracy field with readings ranging from6 to 30 meters. I was plotting some topography for architectural designing so a height difference of actual 2.5 meters gave me a height deference of 15 meters with an accuracy of 21 meters. I ended up with rough altitudes and will amend the data when I can get more accurate data. This product did let me get started on the project and once I knew what was happening managed to get a workable topography.
Verified purchase: Yes | Condition: Pre-owned
It is a good reliable old GPS. Problem is the battery life. This gadget just eats batteries.Its a pitty because the GPS is actually OK for its time period. Just EATS batteries.