It had been working well for awhile and the blacklight has been great so I can accurately see the reading. I'm not sure if it is just the price of this one or what, but it doesn't seem very well made. Later on when I tried to use it again one of the probe pieces broke off. I think I'm going to stick to the other multimeter that I have. This can be found on Amazon . I received this product at a discounted rate in exchange for a honest review.