Review on Get Accurate Miter Cuts With GemRed Digital Miter Saw Protractor MP01 by Michael Shim

I was trying to purchase a tool that would give me an accurate angle measurement for measuring some trim in my house. However, as far as I can tell, this tool needs to be re-calibrated at every use. There is no "pre-calculated" mode. Instead, I have to find a flat surface, calibrate it, then use it every time I turn it on. As the title said, maybe I bought the wrong tool, but with that calibration step requirement, this isn't going to work for me.