The unique transparent color bar shows the dry/comfortable/humid air status at a glance. Ensuring proper humidity helps monitor your family's living and health conditions and prevent colds, dry skin, asthma, allergies, mold, etc. High Accuracy, Fast Update: Temperature range: 14.2F-140F (-9.9C-60C), accuracy: 1C; humidity range: 10%-95%, accuracy: 5%RH. Built-in sensors detect temperature and humidity changes every 10 seconds, providing updated readings. NOTE: When the temperature is below 14.2F or the humidity is below 10%, the reading will be LLF/LL%. When the temperature is above 140F or the humidity is above 95%, the reading will be HHF/HH%. With its built-in powerful magnets, it can be firmly attached to metal surfaces directly; It also comes with a stand for tabletop placement; you can also use the adhesive pad to place it anywhere, including living room, nursery, kitchen, basement, office, greenhouse, guitar room, garden, and wine cellar. NOTE: Leave the adhesive pad on a clean surface for 24 hours before placing the thermometer on a clean surface.