This LCD digital thermometer and hygrometer has a 1.5m long probe, which can test the temperature and humidity of some special places. With a probe so you can put it any place you want It has been widely used in Aquarium, Poultry, Reptile, Incubator, Greenhouses and etc. Measurement Humidity rate: 10% RH ~ 99% RH Humidity Accuracy: + 5 / -5%; Humidity Resolution: 1% RH Power: 2 x 1.5V LR44 button cell batteries (not included) specification Measurement Humidity rate: 10% RH ~ 99% RH Humidity Accuracy: + 5 / -5% Humidity Resolution: 1% RH Temperature measuring range: -50 ? C ~ 70 ? C Temperature accuracy: + 1 / -1 ? C Temperature Display resolution: 0.1 ? C Operating voltage: 1.5V, one button cell size LR44 Dimension: approx.48mm * 9mm * 15mm LCD Dimension: approx.46mm * 27mm Power source: 2 x LR44 button cell (not included) Probe cable length: 1.5m The color black Package included: 1x integrated digital LCD thermometer hygrometer "