This tester is extremely versatile and can help identify and measure many components. The value is much higher than the low cost. Be careful to discharge large capacitors or you may drain the port. The accuracy is amazing for such an inexpensive instrument. The operation of the tester is largely intuitive, but there was not a single guide on the Internet. Battery life is great, but 9 volt batteries are very expensive now, and a wall plate costs half as much as a single battery.
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