Features 1、HIGH ACCURACY: Digital angle finder tool can measure internal, external and contra angles over the full range of 0‑360° with a measurement accuracy of ±0.5° and a resolution of 0.05°. You can switch between degrees and arc minutes to improve measurement accuracy. 2、MULTIFUNCTIONAL: With metric (millimeters) and imperial (inches) measurements on the edge of the ruler, plus an accurate digital readout, it can measure angles and lengths. Horizontal and vertical levels help you check and calibrate (does not appear on the LED, it just helps you determine). 3、DATA HOLD: Measurements at any angle can be held by pressing the hold button, helping the user to record angle values efficiently. The lock angle function helps to maintain accuracy, perfect for woodworking, construction or drafting. 4、ENERGY EFFICIENT: The digital protractor is battery (not included) powered, and its high durability allows it to operate continuously for over 2000 hours. An auto shut off feature saves power and extends battery life. 5、EASY TO USE: Digital protractor comes with a large LED for easy readings. The ergonomic design makes it easy to hold and use. Compact and lightweight, it fits into a your tool bag and is easy to carry and use anywhere. Specifications Item Type: Digital Angle Finder Tool Material: ABS Usage: Measure Angles Battery: 1 x Button Battery, CR2032 (Battery Not Included) Gross Weight: Approx. 134g / 4.7oz Package List 1 x Digital Angle Finder Tool 1 x User Manual