I chose a thickness gauge for auto-selection. The priority was the price, measurement accuracy, and small dimensions. As a result, I chose this one, it is inconvenient to carry large banduras with me, but this one just hooked up to the keychain and that's it. I have tried it in both rain and snow. All is good. There is a 3 year warranty from the manufacturer. I am glad that there is the possibility of continuous measurement.