This LCD digital Thermometer & hygrometer has a 1.5m long probe,which can test temperature and humidity of some special places,it was widely used in Aquarium, Poultry, Reptile, Incubator, Greenhouse and etc.(not apply for Hatching eggs) Dimensions: 4828.615.2mm(measurement has small error) LCD size: 35.7*16.8mm (measurement has small error) Temperature measurement range: -50 to 70 Embedded installation design. Description: Temperature Range: -50°C ~ 70°C Measuring Humidity Range: 10% RH ~ 99% RH Temperature Accuracy: +1/-1°C Humidity Display Resolution: 1% RH Operating Voltage: 1.5V AG13/LR44 batteries Sampling Period: 10S Dimension: approx. 48 x 28.5 x 15.2mm LCD Dimension: approx. 35.7x16.8mm Color: Black