Precise thermometer Hygrometer: Temperature range 14.2 F ~ 140 F, Humidity range: 20 ~ 99RH. Accurate Temperature and Humidity Providing you with accurate real-time temperature and humidity data. Multi-Tool: Works as a thermometer, hygrometer, normal clock, alarm clock, calendar and weather station, and perfectly meets your requirements. LED backlight: large colored LED display support button - control and sound control, in fact, even a touch or vibration can brighten the screen, you can easily get readings whenever you want. Good gift: widely used at home, office, kitchen, bedroom and car. also served as a nice gift for your family and friends. 2-way power supply: Using 3 AAA batteries (not included) or 5V USB cable (not included).