HIGH SENSITIVITY: Hygrometer Thermometer Uses Advanced Technology. Provides a Powerful and Reliable Connection Up to 197ft (60m). And With the Recording Function You Can Know the Reading Clearly. F/C Can Be Converted Easily. ACCURATE READING: Can Be Connected To Up To 3 Outdoor Units (An Outdoor Unit Is Included In Thepackage). 24 Hours Record and Display MAX & MIN Temperature and Humidity Percentages. You Can Adjust the Humidifier Base On the Reading. BACKLIGHT&TOUCHSCREEN: Digital Hygrometer Thermometer with Large LCD Display Features Backlight and Touchscreen, making it Easier to Read in Dim Light Conditions. The Blue Backlight Protect Your Eyes in the Dark. 3 MOUNTING OPTIONS: The Thermometer has 3 Mounting Ways, hanginghole, bracket stable and strong magnet mounting. Different installation satisfied your needs. MULTIFUNCTION: Thermometer Hygrometer Can Work As A Greenhouse Thermometer, Weather Stations, Or A Room Thermometer. It Ensures Proper Indoor Temperature And Humidity And Keep Healthy.