Inductive measurement,no harm on the measured . Convenient and fast. Measurement though HF electromagnetic sensing Super largedetection area. 10 different timber density at option. Wide moisture measurement range: 4%-80% Description: This is a adopting HF electromagnetic waves to measure the moisture content ratio without damaging the object under test. It can be set depending on tree types to raise its measurement accuracy. It can measure the wood moisture fast and convenient. Automatic temperature compensation for moisture measurement. Setting of upper limit of moisture content ratio, promting of overrunning Wood density selection Ultra-large LCD display ensuring clear readings. Data hold function Battery level indication Auto power-off function Moisture measurement range:4%-80% Measurement error:±(1%RH+0.5) Resolution:0.5% Enviroment: Temperature:-10-60℃ Humidity:0-70%RH Dimension:132x67x25mm Powered by 3x1.5V AAA batteries (not included) (The words on the product due to different product batches, but it not affect the use) Color:As shown Material:plastic Package Contents: 1 x Moisture meter 1 x English Instuction manual Only the above package content, other products are not included. Note: Light reflection 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.