Features STURDY ALUMINUM ALLOY: Made from a robust aluminium alloy, this angle search ruler is designed to withstand heavy use and provide long-lasting performance. Multifunctional: press the hold button to maintain the measured data, and use the REV function button to turn the screen over to make reading easier when measuring larger angles and make it more convenient. Wide application: this digital protractor is suitable for construction, drawing, carpentry, masonry, machinery, decoration, home furniture and more, and is ideal for precise measuring and marking. 360° MEASUREMENT: The hinge mechanism of this angle ruler allows for 360° internal measurement and reverse angle measurement, ensuring comprehensive measurement options. EASY TO READ The digital LCD screen makes the reading clear and intuitive, and the laser etched scale is clear and not easy to carry. Specification: Item Type:Digital Angle Ruler Material: aluminium alloy. Specification: 0-200mm Range: 0-360°. Resolution: 0.05°. Tolerance range: ±0.3°. Battery: 3V CR2032 button battery x 1 (built-in) Capacity: 150mAh (single battery capacity) Use: can be used in construction, drawing, carpentry, masonry, engineering, decoration, home furniture and similar work for measuring and marking Package list: 1 x digital angle ruler. Package List 1 x Digital Angle Ruler