Pin and Pinless functions measures moisture in wood and building materials (i.e. sheet rock, cardboard, plaster, concrete and mortar). REED R6018 Offers This dual function moisture meter is capable of detecting moisture in wood and building materials by pin or by running the instrument over the surface area (non-destructive method). The R6018 displays icons to indicate low, medium or high levels of moisture and an audible alert that increases in frequency as detected moisture level rises. Features Pin and Pinless functions detect moisture in wood and building materials (sheet rock, cardboard, plaster, concrete and mortar) Pinless measurement depth up to 1" (25mm) Classifies moisture status as: low, medium and high Audible alert and Data Hold functions Built-in measurement verification and battery check Low battery indicator and auto shut-off Replaceable pins Included R6018 Dual Moisture Meter Pins Protective Cap Battery