Temperature and humidity: the large font shows humidity, and the small font in the upper right shows temperature; The temperature will update each 10 seconds, temperature range: -50-70 Degrees Celsius (-58-158 Fahrenheit), humidity range: 20%RH-90%RH Accuracy: temperature measurement accuracy: +1 degrees celsius, -1 degrees celsius; Humidity measurement, with LCD display, better visual effects, you can see the temperature or humidity in the distance.In addition, its beautiful and chic look is also the beautiful room decoration Battery: two LR44 button batteries, size: 48 x 28.6 x 15.2 mm, this digital thermometer and hygrometer is small and portable, it is no problem to put it in your handbag or backpack and take it to your office or anywhere you want to go Home humidity temperature monitor: this portable thermometer hygrometer measures indoor humidity and temperature, helping you to know the indoor air conditions, ideal choice for your personal and professional life This indoor thermometer allow you to easily and fast know the environment temperature and humidity around you anywhere, nice to use in Reptile ,aquarium, poultry ,office, bedroom, living room, incubators, brooders and any other place that requires monitoring of temperature and humidity levels Product specification: color: black Monitor indoor temperature and humidity With LCD screen Battery: 2 x 1.5V of LR44 button batteries External dimension:1.89 x 1.13 x0.6 in (48 x 28.6 x 15.2 mm) LCD size: 1.4 x 0.66 in (35.7 x 16.8 mm) Weight: 18g (2 button cells included) Humidity measurement range: 10%-99% Humidity measurement accuracy: +/-5% Humidity sampling period: 10 seconds Temperature measurement range: -50-70 degrees Celsius