Review on DigiPas DWL80PRO: Compact Digital Level & Angle Gauge - Accurate Protractor, Bevel Gauge, and Angle Finder, 0.05° Sensitivity, 4 inch Pocket Size by Ryan Springer

Does the job 90% of the time. It gets a little confused (stuck) 10% of the time. You can protect it, do it. I can't jump into a toolbox on a construction site. (The carabiner will break, just like mine). For all that I like it. 90% of the time. Now I carry it in my shirt pocket next to my heart and stay alert.