High precision measurement: : Perfect for wood, lumber, logs, cardboard, paper, concrete and many types of walls. Thanks to sensitive electrode tips, accuracy is less than 2%. 4 modes: : you can switch the different modes according to 4 wood groups, including about 50 wood species, which makes the measurement more accurate. Useful Futions: : large LCD display with value hold function for displaying measurement results; auto shut-off for less battery cost (battery included). Practical design: : Made of ABS plastic for superior durability, sliding feel on both sides. Compact size and lightweight. Comes with a protective case. Wide measuring range: : you can also test building material, different building material with different measurement range, like concrete plaster wall (1.4%-7.4%), anhydrite wall (0%-4, 1%), cement plaster (0.8% -5.1%), limestone mortar (0.4% -3.7%), brick (0.7%), % -8.0 %. 5%).