【Dual Functionality】This innovative tool seamlessly integrates a high-contrast ruler (with millimeter and inch scales) and a digital protractor, enabling swift measurement of lengths, internal angles, and external angles. Suitable for drafting,woodworking, construction and other fields. | 【Smart Functions for Flexible Measurement Control】This protractor can be locked at any angle by rotating the locking knob and pressing the hold function button will hold the reading. When you take large angle measurements and reverse measurements, long press the rev button and the display can be read upside down. Zero button can reset the angle measuring tool at any time. | 【High-Clarity Liquid Crystal Display with Precision Engineering】 TBVHOMM digital protractor is equipped with a large Liquid Crystal Display for easy reading; Measuring Range: 0~999.9°; Accuracy ±0.3°; Resolution 0.1° | 【Extended Readiness with Dual-Battery Provision】Equipped with two cr2032 batteries—one pre-installed and an extra spare—the device is ready for immediate use upon unboxing. | 【Versatile Applications for Professionals and Handmade enthusiasts】Combining the functions of a digital angle meter and a protractor, it can be used to measure all the angles in your workshop for a wide range of uses, such as checking the angle of a table saw blade or the accuracy of a miter saw, making angle cuts or measurements, trimming or wall angle measurements. A perfect gift for woodworkers, architects, handmade enthusiasts, etc