Wireless thermometer and hygrometer LARGE TOUCH SCREEN LCD WITH BACKLIT DISPLAY - This versatile thermometer and hygrometer features a large 4-inch LCD display with a touch screen and backlight for easy nighttime viewing. The bright white backlight will shine for 20 seconds when you press the backlight button, which means you can easily view temperature and humidity readings, even in the dark! It is slim, compact and extremely easy to use. ACCURATE AND RELIABLE - This digital thermometer captures accurate data from the wireless sensor and updates the display every 10 seconds to control temperature and humidity. Perfect to use to ensure a healthy home. The comfort level indicator allows you to proactively adjust the settings of your thermostat, humidifier, and dehumidifier, and is perfect for promoting a healthy home. An essential tool to prevent colds, dry skin, asthma, allergies and mold growth. SIMPLE INTERFACE AND PORTABLE DESIGN - Three simplified buttons on the touch screen allow you to configure the display and quickly check the minimum and maximum temperature and humidity, adjust the readings in degrees Celsius and Fahrenheit (C/F) and select data from the sensors you want to monitor. With battery powered and extremely portable, this device can be mounted as a wall thermometer or freestanding on any flat surface za using the included kickstand. Our wireless sensors accurately predict temperature, humidity, current time and historical trend data. Up to 3 remote sensors can be paired with the main station to monitor up to 3 locations simultaneously. One sensor included; additional sensors sold separately. INTERNAL AND EXTERNAL TEMPERATURE - With one simple glance, you’ll be informed about indoor and outdoor temperature and humidity data, all on one compact screen. A small window icon is also displayed; indicating suggestions for opening/closing the window based on the internal/external data provided. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.