Pinless Wood Moisture Meter, Dr.meter Upgraded Inductive Pinless Tools, Intelligent Lumber Moisture Meter, Digital Moisture Meter for Wood, (Range 4% - 80% RH; Accuracy: 0.5%), MD918 [Inductive & Pinless] Non-invasive and non-marring. Adopting HF electromagnetic waves to measure without damaging the object you test [High Precision] Optional 10 different grades of timber density 4%~80% Maximum Error (1% Rh + 0.5) [Auto Off Function] Ultra large LCD ensures clear readings low voltage prompt will auto shut off within 5 mins if no use. [Calibration Indication] Endows zero calibration prompt temperature calibration prompt ATC overrunning prompt [100% Guarantee] 30-Day Money Back Guarantee, 12-Month Replacement Warranty and Lifetime Support Guarantee.