Portable design, simple operation. Base plate with 4 integrated magnets for attachment to metal surfaces. Degree and mm/m of slope in conversion. High precision and resolution. Measuring range 4*90 (total 360). Vertical and horizontal spirit bubbles are equipped. The measured data holds. Absolute and relative measurement modes. Enter absolute angle measurement mode every time the power is turned on (regardless of changing batteries). Large, clear LCD display with backlight. Large, clear LCD display with backlight. Displayed readings remain vertical to allow easy viewing from all angles. Auto shut-off, 3 slope modes switch. Prompt tone 0/90 (B, C). Fall protection, electromagnetic protection level 3. Can be used for machinery manufacturing, construction engineering, communication installation, home decoration, etc. Product Description Made of premium material, practical, easy to use and use, wide application range, long service life.r Features:r Base plate with 4 built-in magnets for attaching to metal surfaces. r Measuring range of 4 * 90 (total 360).r Degree and mm/m slope in conversion.r Absolute and relative measuring modes.r Enter absolute angle measuring mode every time you turn on voltage (no matter changing batteries).r Large, clear LCD display with backlight.r Vertical and horizontal spirit bubbles are equipped.rMeasured data holds.rDisplayed readings stay vertical to allow easy viewing under all angles.r Automatic shutdown, 3 slope modes switch.r Prompt tone 0/90(B,C).r Fall protection, electromagnetic protection level 3. Can be used for machinery manufacturing , construction engineering, communication installation, home decoration, etc.r Specifications:r Material: aluminum alloyr Main color: silver Measuring range: 4*90r Resolution: 0.1r Accuracy: 0.2r Battery: 2 x LR03 batteries (not included)r Item size: 416*50*21mm/16.4*2.0*0.8inr Item weight: 257g/ 9.1 ounce Package size: 430 * 58 * 28mm / 16.9 * 2.3 * 1.1inr Package weight: 314g / 11.1 ouncer Packing list: 1 * digital spirit level 1 * manual 'user