1. Overview of functions: 1. LCD screen 2. 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 display 6. 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 70 12. The temperature measurement accuracy is 1 C (at normal temperature) 2. Battery Installation Go 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 Operation Integrated Installation ul 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 * 15.2mm LCD screen size: about 35.7mm * 16.8mm Measuring temperature range: -50 C ~ + 70 C Integrated installation design. Measuring temperature range: -50 C ~ 70 C Measure humidity: 10% RH ~ 99% RH Temperature accuracy: +1 / -1 C Resolution of the temperature display: 0.1 C Operating voltage: 1.5V AG13 / LR44 battery Sampling time: 10S Size: about 48mm * 28.6mm * 15.2mm LCD screen size: about 35.7mm * 16.8mm Color: black Voltage operation: 1.5V signal Power 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