The Extech 445815 Humidity Meter with Alarm and Remote Probe is an attractive humidity meter, which features large triple display of relative humidity, temperature and dew point. Built-in stand for setting on a desk or can 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. Also stores the maximum and minimum reading. Remote probe extends 18" for measuring behinds walls. Ideal for use in humid areas where mold can become a problem. Comes complete with built-in stand, wall mount bracket, and 2- AAA batteries.