Great unit, comes with a leather carrying case (I don't use it as I need a bag to keep my hoses, pitot tubes etc) e.) Certificate of Calibration with Custom Specs on it and seal of approval, the magnet on the back is also better than some reviewers say as long as it hasn't popped off and I'm not worried about it. . overall it's smaller, more precise and nicer than most of the competition and that's how i was able to justify the price, at first i was tired because i wasn't sure if it does negative pressure, but it does (the left side does positive and the right side is negative) If you want something in your tool bag that doesn't add weight to an already redundant item, I would recommend this.
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