Multifunctional Angle Finder:The protractor has metric (mm) and imperial (inch) measurements on the ruler edge, as well as accurate digital readout, can measure both angle and 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 bubble detector digital angle allows 0-360 full range 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' any angle, it helps users record angle values efficiently. Locking angle feature helps maintain precision ideal for use in woodworking, construction or drafting. Durable Battery:Super 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, l 'school, home DIY, mechanical processing and other fields (including angle adjustment of table saws, miter saws, band saws, etc.) Digital angle finder tools bring reliability and convenience to your work. Widely used in carpentry furniture, building materials decoration, schools, home renovation, mechanical processing and other fields. 1. 360 internal and external angle measurement, you can keep the data in any position for easy reading after measurement. 2. Excellent locking function - The fixed/loose knob works well and you can adjust the angle finder to the right tightness for your use. 3. The super-large full-screen LCD displays the measurement data, and it is easy and convenient to read it. 4. Fine structure engineering materials, lightweight, wear-resistant, not deformed, scratch-resistant. Knob design The thickening knob is only for loosening and to clamp, which makes the measurement more convenient and reliable. Turn counterclockwise to loosen the ruler. If the edge of the protractor sticks to the edge of the object, turn it clockwise to tighten. Large HD LCD screen The digital protractor is Equipped with a large high-resolution LCD display which can easily read the measurement results. The screen immediately displays the exact numbers. Metric and inch rulers The main ruler has metric and imperial scales, and the font is clear and eye-catching so you can easily measure and draw lines. With an easy-to-read ruler, you can measure lengths from 0 to 190mm quickly and accurately. Degree/degree-minute unit conversion The display mode can be switched from degrees to degree-minutes to better meet your different measuring requirements. Every 360rotation The digital protractor can measure inside and outside angles from 0 360 degrees. The reading range is between 000.0 and 999.9. Comes with 3 clear and intuitive green bottles Use horizontal, vertical and circular bubbles for the evaluation and benchmarking. Provides reliable support for horizontal measurement, vertical measurement and horizontal measurement. Sealed working bottle keeps air out and ensures accuracy. The level is protected by a frame on the end cap, which can effectively prevent damage to the liquid level.