1、Basic Specifications: The digital display angle ruler made of stainless steel is not only practical and durable, but also the ruler and protractor are 2 in 1 for easy measurement. 2、Digital Calculation: The digital display angle ruler has a clear screen display, which can quickly and easily read the measurement results; the digital calculation system makes the angle and length measurement faster and more accurate. 3、Data Lock: This is a digital display angle ruler with data lock function, the data can be rotated and displayed, and can be locked. 4、Locked Device: The digital display angle ruler has a well designed locking device, simply release your hands and lock the angle with a slight twist. 5、Multifunctional Angle Ruler: Protractor is definitely a convenient supplement to any toolbox, widely used in automobiles, meters, construction, shipbuilding, woodworking, engineering, etc. 1 x Digital Display Angle Ruler Item Type: Digital Angle Finder RulerModel: PD290Material: Stainless SteelUses: Automobiles, Instruments, Construction, Shipbuilding, Woodworking, Engineering, etc.Battery: 3V CR2032 x 1 Button Battery (without Battery)Measuring Range: 0-360°Scale Unit: Metric Scale, Imperial ScaleGraduation Value: 0.05°Accuracy: ± 0.2Repeatability: 0.05°Switch Key: ON OFFClear Key: ZEROLock Data Key: HOLD (Short Press this Key)Rotating Display Key: Rev (Long Press this Key for Three Seconds)