HIGH ACCURACY FAST REFRESH Air can enter through the outside weather temp digital hygrometer wireless's 12 vents, and a large airflow passes through the sensor to reflect the most accurate temperature and humidity levels around. The thermometers provide a large measuring range, which measures the temperature from -50℃ ~ 70℃ (-58℉ ~ 158 ℉), The thermometer hygrometer updates every 3 seconds, and temperature accuracy is controlled to within ±1℃ and humidity is controlled to within ±3% RH.DURABLE & EASY TO READ The digital thermometer for home is also equipped with a toggle button for Fahrenheit and Celsius so you can adjust it to suit your reading habits. Featuring a high-contrast color scheme and large numbers, the outdoor thermometer hygrometers screen lets you read temperature and humidity anytime, anywhere. The temperature and humidity monitor has a durable LCD that won't break even when placed in high humidity environments.COMFORT LEVEL & TREND INDICATOR The thermometer hygrometer features 3 levels of icons: wet/comfort/dry, which display the different levels of temperature and humidity based on the air conditioner. In addition, this digital room thermometer also displays the changing trend for each reading. So you can adjust the air conditions to promote good health based on specific data, allows you to keep an eye on home health, and easier make actions for room climate control.EASY TO USE & INSTALL The off/℃/℉ switch gives you more freedom to choose On or Off, Celsius or Fahrenheit degree. Plus, the humidity level indicator shows you a quick view of the air conditioner. The room thermometers can be placed directly on the desk with the folding bracket on the back, or installed on the wall with the hanging holes on the back of the thermometer hygrometer. More practical is that the humidity meter room thermometer can be attached anywhere on the forge with a magnet.