Digital Thermometer Hygrometer Probe for Fertile Egg Hatching Chicks Incubator Measuring Humidity Range: 10%RH ~ 99%RH Humidity Accuracy: +5/-5% Humidity Display Resolution:1%RH Measuring Temperature Range: -50~70 Temperature Accuracy: +1/-1 Temperature Display Resolution: 0.1 Operation Voltage: 1.5v, one button cell size LR44 Dimension: 48mm*28.6mm*15.2mm LCD Dimension: 46mm*27mm