---I ended up smashing this thing with a hammer--It needed to be put out of my misery.>Another fine product from crapco where quality is just a word<I bought it to see if it would work better then the basic zircron I had. Well if completely arbitrary readings are what you want, this is your unit. A roll of wet toilet paper would work as well, and not have the annoying high pitched beeping.man was this thing bad.No ,really it was no good at allseriously, it was junk