s: Non destructive spherical hygrometer: Non-destrictive measurement. Testing area: spherical probe. Measuring depth is 20-40mm. HD color display, Easy to read. With self calibration function.Moisture alarm function: The measured value is 0-100, and the alarm critical value of the different material can be set.Record the MAX and MIN values in test.Wide Applications: can detect Softwood, hardwood, Wet wall, Ceiling, Concrete and so on.30 Minutes Auto OFF.Features: Self calibration; HD LCD screenData hold; Max/MIN RecordAuto-shutdown; Alarm functionLow power indicator; Value displaySpecifications: Product name: Non-destructive moisture meterTesting area: spherical probeMeasurement range: 0-100Measured depth: 20-40mmRange of RISK limit value: 0-50Range of WET limit value: 51-100Automatic shut-down: 30 minutesDisplay: Color screenBattery: 1.5Vx3 AAA(not included)Operation current: About 30mAOperation temperature: 0-40Operation humidity: 0%-70% RHStorage environment: -10-50C(5%-95% RH)tip: Delivery does not include batteryHumidity comparison tableWood: 80, WETCement: 50, WETPlaster: 60, WETMaterial: plasticcolour: Black+BluePackage Contents: 1 x Tester1 x Screw removal tool1 x English manualOnly 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.