Descriptions: Non destructive spherical hygrometer: Non-destrictive measurement. Testing area: spherical probe. Measuring depth is 20-40mm. Large 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 screen Data hold; Max/MIN Record Auto-shutdown; Alarm function Low power indicator; Value display Specifications: Product name: Non-destructive moisture meter Testing area: spherical probe Measurement range: 0-100 Measured depth: 20-40mm Range of RISK limit value: 0-50 Range of WET limit value: 51-100 Automatic shut-down: 30 minutes Display: Color screen Battery: 1.5Vx3 AAA(not included) Operation current: About 30mA Operation temperature: 0-40℃ Operation humidity: 0%-70% RH Storage environment: -10-50°C(5%-95% RH) tip: Delivery does not include battery Humidity comparison table Wood: 80, WET Cement: 50, WET Plaster: 60, WET Material: plastic colour: Black+Blue Package Contents: 1 x Tester 1 x Screw removal tool 1 x English manual 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.