This mositure detector with four measurement modes: Drywall pattern, masonry pattern, softwood pattern, hardwood pattern, this tool also can be used for other materials. Adopt VA full vewing angle reverse display screen, you can read the data more clearly, also easy to operate. Adopt electromagnetic w-ave sensors, it is suitable to measure the object which thickness is 20mm, and the area of the object need be 40x40mm. and units conversion function, you can change the units quickly for your different needs. Ambient temerature and humidity detection function: With the temperature and humidity sensors to detect the ambient temperature and humidity . Over-range alarm function: When the detect value of dry walll and masonry 70% , and when the detect value of softwood and hardwood 17% , the b-uzzer will warning. Measuring Ranges: Softwood: 0%~55% Hardwood: 0%~35% The humidity readings of drywall and masonry are relative values Power: 3 x AAA battery (NOT included) Detection thickness: 20mm Automatic shut-down: 10 minutes Working current: 35mA Operating temperature: 0~40 Working humidity: 0~70% Storage environment: -10~50 (5%95%RH) Item size: 132 x 73 x 33mm / 5.2 x 2.9 x 1.3in Material:ABS colour:Black Package Contents: 1 x Wood Moisture Meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.