Review on Mini Outdoor Map Measurer: Aluminum Alloy Distance Calculator for Camping, Hiking & Cycling – Bnineteenteam Mapping Tool by Bim Cook

Much more complicated than it should be and there is no reset button. You have to reset it to exactly zero by hand, which isn't easy when it comes to scaling - it's a recipe for disaster. The product assumes a certain general scale, but does not give you a direct measurement in inches or centimeters. - So if you don't hit your sweet spot - you end up doing two conversions, choosing the manufacturer's scale, reducing to the standard measurement, and then converting to your scale instead of a simple inch/cm measurement multiplying by a step can be. In the age of the internet, where maps can be customized, this is useless. Imagine a stopwatch where you manually set zero and hundreds of hours and minutes and seconds are 1/60 - that's a lot of math.