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 measurement range is 0-200mm (8 inch), angle measurement 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 display 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 lightweight. CR2032 3V lithium battery, large standby capacity, with auto-off function, can work continuously for more than 5000 hours.Features: Professional measure inside and outside angles and angles of objects 0-360 full measurement 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 and & 39; conversion Specifications: Material: carbon fiber + ABS Length: 0-200 mm (8 inches) Width: 35 mm / 1.38 inch Measurement range: 0-360 Resolution: 0.05 Accuracy: 0.5 Working Power: 3V Battery model: CR2032 Operating time: 5,000 hours Operating temperature: 0C - +50C Working humidity: 85% Auto close screen time: 5min Uses: Angle and Length Measurement Package Included: 1 * Angle Ruler