Multifunctional Angle Finder The protractor has metric (mm) and imperial (inch) measurements on the edge of the ruler, as well as an accurate digital readout, can measure both angle and distance. length. The horizontal and vertical bubble level helps you to check and calibrate (NOTE: it will NOT show on the LED, it will only help you to determine). High Accuracy This detector The digital angle allows a full range of 0-360 to measure internal angle, external angle and contra-angle Measurement accuracy is 0.5, resolution is 0.05. You can switch between degrees and minutes to improve the measurement Accuracy, meet your requirements for different accuracy. Data Hold: Pressing the hold button to hold the measurement at n at any angle, it helps users record angle values efficiently. Locking angle feature helps maintain precision ideal for use in woodworking, construction or drafting. Durable BatterySuper endurance enables it to work continuously over 2000 hours. Digital angle finder auto power off function, save power consumption and extend battery life. The protractor is equipped with a large LED for easy reading. Wide range of applications: This angle measuring tool is often used in carpentry furniture, construction decoration, school, home DIY, mechanical processing and other fields (including angle adjustment of table saws, miter saws, band saws, etc.)