Review on Advanced Digital Reptile Thermometer and Humidity Gauge with Remote Probes - Optimize Hygrometer and Thermo Control for Terrariums, Tanks, Cages, Incubators, and More! by Brian Crockett

When I opened the box I found a thermometer, instructions for use and a AAA battery to power the meter. The thermometer is semi-cheap plastic and I don't think it will stand up to the outside weather conditions. However, it works great for keeping track of my turtles' temperature and humidity. The only criticism is that there is an on/off button. To imagine that it is "inside" or "outside". When I press the button, I get a 7-10° difference in the current temperature. I'm not sure why this button would show higher/lower numbers.