The Extech MO230 Pocket Moisture Meter's large dual graphical LCD displays moisture in wood and other building materials plus air temperature and relative humidity. The analog bargraph displays moisture, minimum/maximum moisture values, and programmable wet/dry indication. Use on wood, paper, wallboard, sheet rock, cardboard, plaster, concrete, and mortar. The memory contains 3 wood groups and four building material groups with calibrations for approximately 150 species of wood and 19 building material types. The index mode has programmable high and low values to quickly locate moisture with comparative measurement. Includes replaceable threaded electrode pins, impact proof housing, auto power off which conserves battery energy, built-in battery check, and measurement verification test. Complete with protective cap, replacement pins, and three CR-2032 button batteries.