Basic product. Less than a dime of metal. You see, the packaging consists of just two parts: a front plastic mold and a cardboard backing that slides out easily. I ordered 4. 2 were ok. 2 batteries were missing (they fell out at the back of the warehouse). 1 had no suction cup (fell out from behind). 1 brace would stop all the reviews you see here from complaining about missing pieces. Including mine. Per device. I have very expensive, very accurate meters that I use for incubation, growth rate, fermentation, etc. That's not what they're here for. Anyone who complains about accuracy is deluding themselves that for a few dollars a thermometer will be a very accurate instrument. This is for convenience in less demanding locations. I have these for my reptile cages. One on the hot side, the other on the cold side. I just need the total range at a glance. You are perfect. Apparently they last for years. I couldn't be happier. If only I had braces :/
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