s: Non-destructive spherical hygrometer: Non-destructive 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 threshold for different materials can be set. Records MAX and MIN values during testing. Wide applications: can detect softwood, hardwood, wet walls, ceilings, concrete, and more. 30-minute 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 Risk limit value range: 0-50 Wet limit value range: 51-100 Automatic shut-down: 30 minutes Display: Color screen Battery: 1.5V x 3 AAA (not included) Operating current: About 30mA Operating temperature: 0-40°C Operating humidity: 0%-70% RH Storage environment: -10 to 50°C (5% to 95% RH) Tip: Battery not included Humidity comparison table Wood: 80, Wet Cement: 50, Wet Plaster: 60, Wet Material: Plastic Color: 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 to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.