1. A combination of a ruler and a protractor for easy measurement. It can be used as a digital protractor to measure all angles in the workshop simultaneously. The digital angle gauge has laser - etched metric and imperial dimensions on the ruler edge, along with an accurate digital display, which can measure both angles and lengths. It is very suitable for carpentry, construction, or drawing. 2. The accuracy of this digital angle ruler is ±0.5 degrees. The measurement range is 0 - 360°/0.00° - 999.9°. It is an excellent choice for many projects and daily use, such as home DIY projects, carpentry, decoration, and processing. 3. The digital glass angle measuring instrument is made of thickened nylon, a wide and high - strength nylon glass fiber material. It has good toughness, is wear - resistant, and does not deform. When measuring angles, the protractor has a large and easy - to - read LCD screen, so you no longer need to look at and guess the angles and lengths. 4. The digital protractor tool has a reverse function. Place the angle measuring instrument at the position where you need to measure the next cut, lock it with the knurled locking nut, make a mark, and then use a miter saw. The screen has a hold function to stop movement and ensure accuracy. You can save a lot of time and energy. 5. It is powered by a CR2032 3V lithium battery, with high - capacity standby and an automatic shutdown function. It can work for more than 2000 hours, saving energy and extending the battery life.