2 in 1 Ruler and Digital ProtractorThe ruler with digital protractor function can measure length and angle at the same time. Equipped with a large full-screen LCD display, easy to measure and read. It can simplify complicated measuring and drawing work. Metric and ImperialLength measuring range is 0 to 200 mm (8 inches), angle measuring range is 0-360. Resolution 0.05; accuracy 0.5. Reset; Button FunctionPress and hold the small zero button for one second, the value on the angle screen will be reset to zero and you can start measuring at any angle. With the lock button, it is convenient to lock the angle in any position. Data Hold FunctionThe Hold button can keep the angle at any time without worrying about data deviation. In addition, our angle ruler also has the function of switching between degree and degree unit. Lightweight and DurableThe material is nylon fiberglass engineering material ultra-strong, which has good rigidity, wear resistance, is not easy to deform, will not scratch your hands, and is light. CR2032 3V lithium battery, large standby capacity, with automatic shutdown function, can work continuously for more than 5000 hours.Features: Professionally measure the inside and outside angles and angles of objects Full measurement 0-360 Easy to lock at any angle, compact and accurate measurement, easy to read With a lock button , convenient to lock the angle at any position 5 minutes automatic shutdown Button function: ON/OFF/ZERO keydata hold button button and conversion ' Specifications: Material: carbon fiber + ABS Length: 0-200 mm (8 inches) Width: 35 mm / 1.38 inch Measuring range: 0-360 Resolution: 0.05 Accuracy: 0.5 Working power: 3V Battery model: CR2032 Operation time: 5,000 hours Operating temperature: 0C - +50C Working humidity: 85% Auto screen off time: 5min Uses: Angle and length measurement Package Included: 1 * Angle Ruler