[feature] Aluminum Frame and Ruler --- The angle gauge frame is made of all aluminum, compact and very convenient. Portable size, comes with a ruler, convenient to use while working. 4 Units of Measurement --- The electronic inclinometer also provides inclination and angle readings in inches/feet, degrees, millimeters/meters, and percent slope. In addition, it is lightweight and small enough to fit into tight places, so it is easy to carry. Audio Indicator --- This digital angle gauge and level has a switchable audio signal function. Sends an audible signal with a beep when you reach 0 or 90. And it is both dust-proof and water-spray-proof. V-Groove Magnetized Base --- With V-groove bevel gauge and powerful built-in 3 magnets on the base, you can easily mount this tool on metal surfaces such as pipes, conduits, metal fabrication and steel structures frame. [product information] Product Name: Digital Display Mini Inclinometer Color: Refer to pictures Material: aluminum alloy Size: Width 120mm Packing list (available after purchasing a product): digital display mini inclinometer*1 beg to be excused: 1. Due to the long shipping time, the item may be damaged during the transportation, if the item is damaged, please leave us a message through the official website immediately before leaving a comment, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Color may vary by monitor.