1. Overview of functions: 1. LCD screen2. Dimensions 48 * 28.6 * 15.2mm (there is a little error in the measurement) 3. LCD screen size: 35.7 * 16.8mm (there is a little error in the measurement) 4. Weight: 35 grams (battery included)5. Humidity display6. Humidity measuring range 10% ~ 99% 7. Humidity display resolution 1%8. The humidity sampling period is 10 seconds (1 minute) 9. The accuracy of the humidity measurement is 5%10. Nominal voltage DC1.5v (2 x AG13 button cells) 11. Temperature measurement range -50 to 7012. The temperature measurement accuracy is 1 C (at normal temperature) 2. Battery InstallationGo back to the back of this product;Push the battery compartment cover in the direction indicated by the arrow, insert two LR44 button batteries into battery compartment 3. Installation and OperationIntegrated Installationul This LCD digital thermometer and hygrometer has a 1.5m long probe, which can test temperature and humidity in some special places. It has been widely used in aquariums, poultry, reptiles, incubators, greenhouses, etc. / p Size: about 48mm * 28.6mm * 15.2mmLCD screen size: about 35.7mm * 16.8mmMeasuring temperature range: -50 C ~ + 70 CIntegrated installation design.Description:Measuring temperature range: -50 C ~ 70 CMeasure humidity: 10% RH ~ 99% RHTemperature accuracy: +1 / -1 CResolution of the temperature display: 0.1 COperating voltage: 1.5V AG13 / LR44 batterySampling time: 10SSize: about 48mm * 28.6mm * 15.2mmLCD screen size: about 35.7mm * 16.8mmColor: blackVoltage operation: 1.5V signalPower source: 2 LR44 button batteries (included)This LCD digital thermometer and hygrometer has a 1.5m long probe, which can test temperature and humidity in some special places. It has been widely used in aquariums, poultry, reptiles, incubators, greenhouses, etc. / li The package includes:1 x digital hygrometer thermometer