The thermometer measures the air humidity and temperature in your baby`s room. The product is practical as it is also equipped with big display, clock and alarm clock. The thermometer has big measuring scale for the temperature -50°C?70°C and for the humidity from from 10% to 99%. It is with temperature measure accuracy of +/- 1°C and humidity measure accuracy of +/- 5%. The product is extremely easy to use with modern design and great functions. It works with 1 * 1.5V AAA battery.