12" Digital Ruler2 in 1 angle ruler and carrier with LCD display, measures 300mm/12inch and 360, can measure length and angle at the same time. It is an ideal tool for measuring the Precise MeasurementThis angle gauge has an LCD display for easy reading. With an accuracy of 0.3 and a resolution of 0.05, it is perfect for measuring relative angles and. Hold and Zero function, very convenient to use in daily work Easy to Use To zero at any angle for relative measurement, you can press and hold the reset button. hold angles at any time; automatic shutdown after 6 minutes of inactivity Multifunction This digital angle gauge is combined with angle sensor and stainless steel ruler, can measure angles and length (metric and imperial); The hinge mechanism on the angle ruler allows for 360 degree measurement inside and out. High QualityThis protractor and ruler is made of stainless steel, it has good corrosion resistance and impact resistance. It is very durable and has a very long lifespan. Specifications: Measuring Range: 0-360 Resolution0.05 Accuracy0.3 Repeatability0.05 Battery3V CR2032 Package Included: 1*Digital Angle Ruler 1*CR 2032 Battery