Aurosports LCD Display Digital Wood Moisture Meter - To Measure the Percentage of Water in Given Substance (Wood, Sheetrock, Carpets and More) ((Range 2% - 70% RH; Accuracy: 0.5%)) The most accurate tester:Testing Range: 2%~70% RH; Accuracy: 0.5% Large and easy-to-read LCD screen; Low battery indication Date holConvenient Hold Feature Freezes Reading Easily display various readings with oversize LCD; Modular sensor pins. Comes With A 9 Volt Battery So You Can Use It As Soon As It Arrive