1、2 IN 1 DESIGN: The 2 in 1 design of the level gauge and the digital display angle ruler provides high accuracy and fast measurement. 2、ANGLE SENSOR: With angle sensor, it is suitable for angle measurement and setting of home improvement, tooling and furniture installation. 3、LCD DISPLAY: The front and back dual LCD display and screen display lock function, intuitively display the measurement results, easy to read. 4、LOCKING KNOB DESIGN: Just press the screw to keep the ruler at any angle, maintain accuracy, and lock it at any angle. 5、MULTIPLE FUNCTIONS: With hold and reset function, support automatic shutdown, laser engraving scale is clear and accurate, long service life. Item Type: Angle Ruler Material: Aluminum Alloy Weight: Approx. 446g / 15.7oz Product Size: Approx. 27.5x5.1x2.3cm / 10.8x2.0x0.9in Battery Parameters: A 9V Battery, 600mAh (Built In) Digital Display Accuracy: ±0.1° Measuring Range: 0-185° Automatic Shutdown Time: 3 Minutes Working Temperature: -20℃ - +70℃ 1 x Angle Ruler