Protractors descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Universal Bevel 360 Degree-mini Electronic Digital Protractor Inclinometer. Features: Wide Application Our Mini Digital Protractor Provides Quick and Accurate Measurement in Auto Repair, Machine Manufacturing, Constructional Engineering, and Decoration. This Magnetic Digital Angle Locator is a Small and Compact, but Highly Accurate Digital Angle. Locator Tool for Measuring Any Angle. This Digital Angle Locator Can Measure in Absolute or Relative Measurements for Determining the Exact Angle or the Difference Between 2 Angles. It's a Must-have for Woodworking, Construction, Machinery, Telecommunications, Automobile, Etc. Dual Function Relative and Absolute Measurement Can Be Interchanged at Any Position. And Equipped with an Angle and Slope Readout Conversion. Magnetic Base Magnetic Base Allows This Digital Angle Gauge to Be Attached to Any Ferrous Metal Surface. Compact and Lightweight Constructed of Aluminum Alloy and ABS, This Angle Inclinometer is Compact and Lightweight, Convenient to Carry Around from Job Site. Energy Saving Power-off Automatically in 5 Minutes. Specifications: Measuring Range: 4 X 90 ° Accuracy: 0.1 ° Working Temperature: 0  - 40 Working Humidity: 40%  - 80% Battery: Require 3 X 3V CR2032 Batteries (not Included) Package Includes: 1 X Protractor   No Including Battery 1X  User ManualEnglish   . Products number : SOMONO158523