Instrument displays the humidity, room temperature, and dew point simultaneously. Should the humidity exceed 55%, 60% or 65% an alarm is triggered. This function can help prevent mould and mildew forming around the house and can also warn the user when the air is so humid it is potentially unhealthy to breath. The instrument is extremely accurate and is equipped with Swiss precision sensors. Specifications: Size display: Width: 95 Height 90 Depth 25mm Wide size of humidity and temperature 18 mm, dew point 13 mm Temperature range indoor of -10 until +60ÁC (Resolution 0,1 degree) Indoor humidity measuring range 1% until 99% (Resolution 0,1 degree) Acoustically and optically alarm Adjustable alarm limits at 55% 60% 65% Display of min- and max values Display is suitable for table standing (stands) or wall fixing. 2 x 1.5 V AA batteries included.