WINGONEER&reg; 2-in-1 Digital LCD Embedded Thermometer Hygrometer with External for Reptile Incubator Aquarium Poultry - White This LCD digital Thermometer & hygrometer has a 1.5m long probe, which can test temperature and humidity of some special places. With a probe so you can put it any place you want It was widely used in Aquarium, Poultry, Reptile, Incubator, Greenhouse and etc. Measuring Humidity Range: 10%RH ~ 99%RH Humidity Accuracy: +5/-5%; Humidity Display Resolution:1%RH Power: 2  1.5v LR44 button cell batteries (included),