Advanced high-precision sensor: built-in with accurate and sensitive sensor, the thermo-hygrometer updates the temperature and humidity every 10 seconds; temperature measurement range: -10~70. Temperature measurement accuracy: 1 C, indoor / outdoor humidity range: 10%RH-99%RH. The deviation accuracy of the humidity measurement: 5%RH. You can choose the unit of the digital hygrometer in Celsius or FahrenheitIntelligent digital thermometer hygrometer: the mini digital hygrometer has 2 symbols. When the humidity is between 40% and 70%, it shows a smiling face. If the humidity is lower than 40% or higher than 70%, it is displayed dissatisfied to quickly notify DRY/COMFORT/WET air condition to adjust your humidifier or dehumidifier accordingly and ensure you will always live in the most comfortable environment.3 mounting methods: you can either place this room thermometer through the fold-out stand or mount it on the wall through the hanging hole on the back; thanks to the integrated magnet, the inner hygrometer can also be attached to metal surface. Powered by CR2032 (battery included), battery life up to 12 months.Clear LCD display: room thermometer provides a real-time temperature/humidity display with large numbers on a 2.1 inch LCD screen, so you can read the thermometer from any angle and distance.For a healthy indoor climate: with the digital mini humidity thermometer, you can keep an eye on the temperature and humidity through the clear display and now you have control over the indoor climate in the rooms where you spend most of the time, e.g. bedroom, bathroom, children's room, baby room, warehouse, basement, greenhouse, etc.