Ruler and Protractor Combo: Measure length and angle with 0.3 accuracy. Suitable for DIY projects, woodworking, decorating, and machining applications.360 Degree Measurement: Angle ruler hinge mechanism allows full 0 to 360 degree range for measuring interior and exterior angles.Large LCD Display: Full-screen LCD for clear readings. Simple operation with three push buttons for easy measurement and visibility.Power Supply: Uses a CR2032 3V lithium battery (not included). Features auto power-off function for extended battery life. Designed for low power consumption with long standby capacity.Lightweight and Durable: Reinforced ruler construction with high-strength nylon fiberglass material. Offers excellent rigidity, wear resistance, and resistance to deformation.Features:Material: Nylon fiberglassLength: 0-300mmMeasuring Range: 0-360Resolution: 0.05Accuracy: 0.3Working Voltage: 3VBattery Type: CR2032 (not included)Operating Life: Up to 5000 hoursOperating Temperature: 0C to +50COperating Humidity: 85%Auto Power-Off Time: 6 minutesUses: Angle and Length MeasurementPackage Includes:1 x Digital ProtractorNote: All measurements are taken manually. Please allow 1-3 cm variation. Color may vary slightly due to lighting and display differences. Actual product may differ slightly from images shown.