Made of fine quality material, practical, easy to operate and use, wide application range, has a long service life. Features: Base plate with 4 built-in magnets for attaching on metal surfaces. Portable design, simple operation. High accuracy and resolution. Measuring range of 4 * 90 (total 360). Degree and mm/m of slope in conversion. Absolute and relative measurement modes. Enter absolute angle measurement mode every time being turned on (no matter change the batteries). Large and clear LCD with backlight. Vertical and horizontal spirit bubbles are equipped. Measured data hold. Displayed readings remain upright to enable easy viewing at all angles. Automatic shut-down, slope 3 modes switch. 0 / 90 prompt tone (B, C). Fall protection, electromagnetic protection level 3. Can be used for machinery manufacturing, communication installation, home decoration, etc. Specifications: Material: aluminum alloy Main color: silver Measuring range: 4 * 90 Resolution: 0.1 Accuracy: 0.2 Battery: 2 * LR03 battery (not included) Item size: 416 * 50 * 21mm / 16.4 * 2.0 * 0.8in Item weight: 257g / 9.1ounce Package size: 430 * 58 * 28mm / 16.9 * 2.3 * 1.1in Package weight: 314g / 11.1ounce Packing List: 1 * Digital Spirit Level 1 * User Manual