Proster Digital Wood Moisture Meter Handheld LCD Moisture Tester Damp Meter Detector with 4 Test Probe Pins for Walls Firewood Paper Humidity Measuring Proster MD814 Digital Wood Moisture Meter: a Great Moisture Meter with 4Test Probes and Large Size Digital LCD, to Detect Damp, Rotting Wood or Wet Walls more conveniently When You Inspect Your Home influence factorSomething may have a Large Impact on Wood Moisture when testing, Such as Special Wood, Different Temperature, the Wood Growing Up in Different Place Measurement principleRange: 5% to 40%; Resolution:1%; Operating temperature: 0  to 40  (32 F to 104 F) 0 to 70%RH convenient tipsData Hold Functoin; High Resolution and Response Quickly; Symbol and Unit Display help to Read the Value Conveniently Significant efficiencyEspecially Useful and Help You to Find Moisture in Wood, in Plaster or Drywall Walls and Also In or Under Carpet When You Plan to Buy a Foreclosed Home