Features: 12 IN 1 DESIGN: The 2 in 1 design of the level gauge and the digital display angle ruler provides high accuracy and fast measurement. 2ANGLE SENSOR: With angle sensor it is suitable for angle measurement and setting of home improvement tooling and furniture installation. 3LCD DISPLAY: The front and back dual LCD display and screen display lock function intuitively display the measurement results easy to read. 4LOCKING KNOB DESIGN: Just press the screw to keep the ruler at any angle maintain accuracy and lock it at any angle. 5MULTIPLE FUNCTIONS: With hold and reset function support automatic shutdown laser engraving scale is clear and accurate long service life. Specification: Item Type: Angle RulerMaterial: Aluminum AlloyWeight: Approx. 446g / 15.7ozProduct Size: Approx. 27.5x5.1x2.3cm / 10.8x2.0x0.9inBattery Parameters: A 9V Battery 600mAh (Built In)Digital Display Accuracy: 0.1Measuring Range: 0-185Automatic Shutdown Time: 3 MinutesWorking Temperature: -20 - +70 Package List: 1 x Angle Ruler Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.