General description This Digital Angle Ruler is a versatile measuring instrument that combines a protractor, spirit level, circular spirit level, and ruler into one compact tool. It is designed for measuring angles up to 360° and features a large LCD display for easy reading of measurements. Technical specifications Measuring range: 0-999.9° Resolution: 0.05° (3') Accuracy: ±0.5° Length: 230 mm Usage Measure internal and external angles up to 360°. Use the HOLD button to lock data for easy reference. Zero the measurement at any position for absolute and relative measurements. Read measurements easily on the large LCD display. Utilize the spirit levels to check for level surfaces (note: does not display numerical values). Other information Made from high-strength nylon fiberglass for durability and wear resistance. Lightweight and portable design with a hanging hole for easy storage. Auto shut-off feature activates after 5 minutes of inactivity to conserve battery.