Defective
The one I got does not work at all. We installed fresh batteries, pressed the button, and nothing. So I tried holding the power button for three seconds. Nothing. Five seconds? Nada. Ten? Nope. I tried just holding in the button until the tester turned on, but it never did.<br />I got some different batteries and went through the process again. Still not a flicker. I don’t know if I got one that had a rare flaw or a common one, or if these units just don’t work at all.
Rating: 1 stars