General description This Digital Protractor Digital Angle Ruler is a versatile measuring tool that combines a ruler and protractor, allowing you to measure length and angles with an accuracy of ±0.3°. It is ideal for various applications including DIY projects, woodworking, decoration, and machining. Technical specifications Measurement Range: 0 to 360 degrees Accuracy: ±0.3° Power Supply: CR2032 3V lithium battery Battery Life: Over 2,000 hours with automatic power-off function Material: Ultra-strong nylon glass fiber engineering material Dimensions: 200mm Usage This protractor is designed for easy operation with only three push buttons, making it simple to measure and read angles and lengths.