Features: Made of aluminum alloy material, not easily damaged or bent, has a long service time, you do not need to change it often. The LCD display of the product has a backlight function. The backlight will automatically turn on when in use, and will automatically turn off after 30 seconds of inactivity when not in use. The product can be used normally in low light and dark environment. Automatic shutdown function: It will automatically shut down when there is no operation for three minutes, which can save power. Wide ranges of uses: suitable for construction, woodworking, machining, home DIY, etc. Place the bottom of the product tightly on the surface of the object to be measured. If the horizontal bubble in the corresponding direction stays between the marks on the surface of the horizontal bubble, it means that the surface is horizontal or vertical. With the hold function and z-ero function, press the z-ero button or z-ero button to achieve these functions, give you a better using experience. Specifications: Material: aluminum alloy Measuring angle ranges: 0~225 Resolution: 0.05 Accuracy: 0.5 Repeatability: 0.05 Power: 2 * AAA battery (NOT included) Working temperature: 0~40 Storage temperature: -20~60 Item size: 415* 51 * 22mm / 16.3 * 2.0 * 0.9in Item weight: 357g / 12.6ounce Package size: 436 * 73 * 42mm / 17.2 * 2.9 * 1.7in Package weight: 411g / 0.9lb Packing list: 1 * Angle Finder 1 * User Manual