Rule &amp; digital protractor: A ruler with digital protractor function, capable of measuring length as well as angle at the same time. Say goodbye to complicated measuring or tracing work. Metric and Imperial System: Length measurement range 0 to 200 mm. Angle measuring range 000.0 to 999.9, the ruler can be rotated more than 2 turns. Resolution 0.1; precision 0.3. Zero at any position (taring): Press the small 'zero' button for one second, the value on the screen The angle will therefore be reset to zero and you can start the measurement at any angle. Turn the large knob in the center to lock/unlock the ruler at any angle, to avoid moving or losing the measured angle. Simple but durable: Simple design, but in stainless steel, an excellent material ensuring exceptional strength. The lifespan of the button battery is more than 2000 hours to resolve any battery life concerns. More information on the 200 mm digital angle ruler - Metric screw and dial - Hold function Precise measuring accuracy Digital angle display Simple and intuitive operation Measuring foot made of steel, each 200 mm long Lock function for safe transmission of results The rulers are made of metal and the imprint is clearly readable< /p> Perfect for measuring angles and miter angles NOTE: Please note sharp edges and corners to avoid injury. Function: 1, After several minutes without further use, the display will automatically turn off. 2, If you briefly press the power off button, then adjust an angle, it will turn on automatically. 3, If you want to cancel the second function, press the power off button for more than 3 seconds. < p>4, the protractor can be used to determine the angle with the rotating screw. Lock function and digital display The display has a good contrast and can be read quickly. Measuring range: 000.0 ~ 999.9 The stainless steel ruler ensures good readability with measurements in inches and in millimeters. Features Color: Silver Material: stainless steel Length: 200mm Range Measuring range: 0 ~ 999.9 Resolution: 0.1 Accuracy: 0.3 Operating temperature: 0 ~ 50 Working humidity: 85% RH Delivery quantity: 1 piece