Description: Since it is designed with a backlight LCD display, it allows you easily to read in a dark environment. Featuring magnet bottom design, it can be easily attached to the measuring workpiece. Since it is designed with data lock-in, it is convenient to read. Featuring portable size, it is easy to combine with other measuring tools to enlarge measurement range. Made of ABS, the protractor is eco-friendly, shock-proof and lightweight to use. After about 3 minutes of non-using the equipment, it will switch off automatically. Powered by AAA batteries, and has low battery indicator. The length of this product is 6.8cm and width is 3.2cm. The height of this product is 6cm. Audible tone with different beep frequency at -1.00- to -0.05, 0.00, +0.05 to +1.00; -89.00 to -89.95, 90.00, +89.95 to +89.00. This angle protractor is suitable for woodworking, manufacturing, automobile repair and so on. It features set zero function at any angle, self checking accuracy, self calibration, etc. : Digital Protractor Item Name: Digital Protractor Material: ABS Resolution: 0.05 Degree Display: LED Screen Horizontal Level Measurement Range: 0 to 360 Degrees (4 x 90 Degrees) Accuracy: Plus or Minus 0.1 Degrees at 0-90 Degrees. The Rest of the Angles Are Plus or Minus 0.2 Degree Measurement Units: Degrees, % Percent, Mm/m, In/ft Dustproof and Water-resistant: IP42 Operating Temperature: 0-40 Degrees Celsius Storage Temperature: -10-50 Degrees Celsius Power Supply: 2 x 1.5V AAA (Not Included) Features: LCD Display Backlit, Magnetic Bottom, High Precision Size Details: Size: 6.8cm x 3.2cm x 6cm/2.68" x 1.26" x 2.36" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Digital Protractor