Fahrenheit Digital Hygrometer and Thermometer for Reptile Terrarium and Incubator, 3.5 feet Cable with a Probe, 1.5V two Cells Please allow me to monitoring of both the temperature and humidity of your terrarium a corner or a unit Fahrenheit number display read easier than and more exact than the dial The high sensitive probe can be fast accurate monitoring any corner from your terrarium, but you can't put in water It's apply any small terrestrial animal or plant The shape was embed design. It can be embed on your terrarium wall, Not occupy manor of them from terrarium