100% Brand New and high-quality max min reptile tank thermometer hygrometer for precise supervision of the temperature and air humidity in terrariums, vivariums and reptile tanks or other applications such as brooders and incubators. The unit will show the temperature at the remote probe (OUT) and at gauge (IN). The readout can be switched using the IN/OUT button function. The Max Min button function will show the maximum or minimum temperatures at either the gauge or remote probe. The humidity level is measured using the remote humidity probe. Each external probe has cable length of 36″ (900mm) with suction cup. Stores maximum and minimum temperatures.