The front panel of this indoor/outdoor thermo-hygrometer is buttonless, which makes for a clean display. You can set everything by pressing the four buttons on the back. This device includes one wireless remote sensor for detecting the outdoor temperature and humidity. Press the button to check the high/low or current temperature for the day and humidity levels whenever you want. It also includes easy-to-read icons that display any humidity changes. Plus, this device displays the time and a calendar for your convenience. When using it at night, press the “Light” button to keep the white backlight on for 20 seconds. Gentle on the eyes, yet bright enough to view in the dark, it’s perfect for checking the temperature, humidity, and weather forecast at night.