- High Precision Measurement: The 4-in-1 multifunctional digital angle sensor measures internal, external, and inverted angles from 0 to 360°, ensuring high accuracy with a precision of 0.5° and a resolution of 0.05°/3 inches. Easily switch between degrees and minutes to meet diverse technical needs. - Versatile Goniometer: This digital protractor features both metric (0-190 mm) and imperial (0-7 inches) scales for measuring lengths, along with an easy-to-read LCD display. It includes three vials—vertical, circular, and horizontal—to help you verify and adjust levels effectively. - Data Maintenance Feature: The hold button allows you to store angle values at any position, while the locking knob secures the angle for accurate measurements. Ideal for woodworking, construction, or architectural drawing, this tool ensures precision in every project. Note: The locking knob allows for some movement of the main rule. - Convenient Battery Design: Comes equipped with a CR2032 3V battery and features an automatic shut-off function to conserve energy and prolong battery life. The battery compartment is easily accessible for replacement. Use Scenarios: 1. Woodworking Projects: Achieve precise angles for cutting and joining materials, ensuring perfect craftsmanship. 2. Construction Applications: Verify angles and levels for framing and installation tasks, guaranteeing structural integrity. 3. Architectural Design: Utilize the goniometer in drafting plans, ensuring accurate measurements for building designs. This digital protractor is an essential tool for professionals and hobbyists alike, combining functionality, ease of use, and reliability.