Best Industrial Grade AccuracyHumidity gauge with built-in Swiss sensors, it detects subtle changes in humidity and temperature and updates readings every 10 seconds. The temperature tolerance is 15C and humidity is 2%RH (1-99%RH). The digital hygrometer is pre-calibrated for accurate temperature and humidity measurement. Large Backlit Easy to Read DisplayTemperature and humidity monitor with large 3.5" HD LCD display. One touch on the top to turn on the backlight. Clear and energy-saving, easier reading under dim backlight. Reliable operation buttons on the back for manual adjustment or F/C switching. 24 Hour/All Time Max & Min RecordThe room thermometer displays high and low records of the past 24 hours and any time. The indoor thermometer measures conditions and instantly identifies changes in temperature and humidity. The comfort indicator ensures proper humidity control, helping you maintain a comfortable atmosphere in your home. Wide Applications & More Mounting OptionsWith a retractable stand, two powerful magnets and a wall mounting hole, this indoor digital thermometer can be easily attached to your refrigerator, wall or placed on a table. Suitable for baby room, nursery, office, closet, incubator, greenhouse, garden, wine cellar, basement, terrarium, etc. Calibration Supported The monitor can be manually calibrated to improve data readings when product placement or environmental factors impact the accuracy of your data. Calibration certification from the Aerospace Institute for Metrology and Measurement Technology. Operated by 2 x 1.5V AAA batteries (not included). Size: about 85*65*25mm Color: Black Quantity: 1 pc