<ul><li>Ruler and protractor combination: measure length and angle with an accuracy of ±0.3°. This protractor is a good choice for DIY projects, woodworking, decorating, machining.</li><li>360 Degree Measurement: Angle ruler hinge mechanism allows full range from 0 to 360 degrees for measuring interior and interior inverted angles.</li><li>Large LCD display: Large full screen LCD display, easy operation with only three push buttons, easy to measure and read.</li><li>Power supply: CR2032 3V lithium battery, large standby capacity with auto power off function , can work over 2000 hours, saving power consumption and extending battery life.</li><li>Lightweight and durable: Ruler thickened and widened with super-strong nylon fiberglass engineering material, good rigidity, wear resistance, no deformation</li></ul> LCD display <p ><b>Hold function</b> Large full-screen LCD display, easy operation with only three push buttons, easy to measure and easy to read. </ p> Battery model: CR2032 Power supply: 3V Operating time: 5000 hours. Screen auto-close time: 6minutes. Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be some difference of color, the actual object received shall prevail.