Find this product on YouTube and make sure your expectations match the general conclusions. I've had success and found it to meet specs. As a professional handpiece, it has the best accuracy when used in the middle of its rated current. (ie) don't expect this thing to measure milliamps accurately. The specs even specifically warn against it, but the reviews here indicate dissatisfaction "because it was an inaccurate 800mAh reading", lol, you get my meaning. Also don't forget the 25-30 dollars.
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