One unit comes with a great manual - and it's easy to use, but the other requires you to be an electrical engineer who knows how it works. I have to look for it somewhere before trying to use it. It's a good buy and a unit comes with a case plus cables and extra adapters for testing just about anything electrical. Outperforms the old "Radio Shack" sensor I still have.
β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
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π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
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