Feature: 1. 4 Angles Unit Switching: measures angle in ° (degrees), % (percent), mm/m \u0026 IN/FT. Auto-reverse reading of LED display. 2. V-Groove \u0026 Built-in Magnets on the Base: V-Groove at the measurement base for easy attach to round pipes for accurate measuring. And the powerful magnet to secure the attachment to iron or metal surface. 3. Groove on the 2 Sides of Housing: for easy doing the mark work. 4. Auto-off \u0026 Low Battery Indicate: after about 3 minutes of non-using the equipment, it will switch off automatically. Powered by 2pcs 1.5V AAA batteries, and has low battery indicator. 5. Data Hold: hold-function to freeze the measurement, thus you can move the device to read the display. 6. Audible Buzzer: audible tone with different beep frequency at -1.00~-0.05, 0.00, +0.05~+1.00; -89.00~-89.95, 90.00, +89.95~+89.00. 7. Other Features: set zero function at any angle, self checking accuracy, self calibration, etc. Specification: The digital level is a highly versatile leveling tool designed for measuring the angle on a surface quickly and accurately. Features: 4 Angles Unit Switching: measures angle in ° (degrees), % (percent), mm/m & IN/FT. Auto-reverse reading of LED display. V-Groove & Built-in Magnets on the Base: V-Groove at the measurement base for easy attach to round pipes for accurate measuring. And the powerful magnet to secure the attachment to iron or metal surface. Groove on the 2 Sides of Housing: for easy doing the mark work. Auto-off & Low Battery Indicate: after about 3 minutes of non-using the equipment, it will switch off automatically. Powered by 2pcs 1.5V AAA batteries, and has low battery indicator. Data Hold: hold-function to freeze the measurement, thus you can move the device to read the display. Audible Buzzer: audible tone with different beep frequency at -1.00~-0.05, 0.00, +0.05~+1.00; -89.00~-89.95, 90.00, +89.95~+89.00. Other Features: set zero function at any angle, self checking accuracy, self calibration, etc. Specifications: Material: ABS+aluminum Resolution: 0.05° Display: LED screen Horizontal Level Measuring Range: 0~360°(4*90°) Accuracy: ±0.1° at 0° and 90°. ±0.2° at the rest angles Unit of Measurement: ° degrees, % percent, mm/m, IN/FT Dust & Water Proof: IP42 Working Temperature: 0~40℃ Storage Temperature: -10~50℃ Power Supply: 2 * 1.5V AAA (NOT included) Item Size: 68.4 * 31.8 * 59.9mm / 2.69 * 1.25 * 2.36in Item Weight: 103g / 3.63oz Package Weight: 123g / 4.34oz Package Size: 9.3 * 7.7 * 5cm / 3.66 * 3.03 * 1.97in Packing List: 1 * Digital Level Package List: 1 * Digital Level