The Non-contact moisture sensor monitors the moisture in wood and other building materials without causing surface damage. High frequency sensing technology allows the meter to take non-invasive moisture measurements. ser programmable alarms alert the user if moisture measurements exceed alarm set-points. his meter is shipped fully tested and calibrated and with proper use, will provide years of reliable service. Display type: Backlit LCD Display digits: Three numeric displays; each displaying from 0.0 to 100.0 Display icons: HOLD,DRY,RISK, WET, MIN, MAX, and low battery Resolution: 0.1% Measurement Accuracy: +/-(2% of reading +5digits) Low battery Warning Level:Less than 4.8VDC Operating Temperature: 0 to 45 Operating Humidity: 90%, 0~30. 75%, 30~45. Power Supply: Four 1.5V "AAA" batteries Auto Power Off: After 10 minutes of inactivity Colour:black Material:plastic Package Contents: 1 x Digital Wood Moisture Meter 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.