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Fluke 1AC II VoltAlert Non-Contact Voltage Tester, Pocket-Sized, 90-1000V AC, Audible Beeper, 2 Year Warranty, CAT IV Rating, Packaging May Vary
$ 21.89 is a low price for the Fluke tester though I know other brands (e.g. Klein) can be found at lower price though I thought this was a good price given that Fluke is a "premier" brand.