The Extech 445815 Humidity Meter with Alarm and Remote Probe features a large triple display of relative humidity, temperature and dew point. Has a built-in stand for sitting on a desk but can also be mounted to a wall with included bracket. A visual and audible alarm warns when the humidity level goes above or below the adjustable set point. Meter also stores the maximum and minimum readings. Remote probe extends 18 in. for measuring behind walls. Ideal for use in humid areas where mold can become a problem.