[Measure 360 degree&Data Hold]Digital Angle Protractor measuring range: 0-999.9 degree; resolution:0.05 degree (3');Accuracy: +/- 0.5 degree;The angle finder allows 360 degree to measure internal and external angle. Display supports Degree and Degree/Minute unit conversion.Angle finder level has hold button and zero button to make your measurement more efficient. If you want to lock the data, pls press the HOLD button rather than twist the knob. (The knob is only used for loosening and tightening,can't completely fix the angle) [4-in-1 Multi-function Digital Angle Finder Protractor]: This product is combination of protractor, spirit level, circular bubble level and ruler. It is calibrated by 3 of horizontal, vertical and circular levels. It can be used like a spirit level, helping you to check and calibrate (NOTE: It is NOT a digital level,will not display number on LCD, only help you to judge if it is horizontal/vertical/horizontal plane is tilted or Not).The main ruler is double scale in metric and inches. [Large LCD Display and Auto shut-down]: This protractor angle finder designed with full screen large LCD display, which allows you to read data easily and quickly. The digital angle ruler will shut off automatically after 5 minutes of inactivity to save power.Digital angle gauge also has a zero button, which can be reset zero at any position, convenient for absolute and relative measurement. [High Quality Material and Portable design]: The thickened and widened ruler body is made of super-strength nylon glass fiber engineering material, which has good hardness, wear resistance, no deformation, no scratching, light and durable.Angle gauge total length is 230mm/9inch, small delicate design, easy to carry. Hanging hole design is convenient for hanging. [Wide Range of Applications]: This angle measure tool is often used in woodworking furniture, construction decoration, school, home DIY, mechanical processing and other fields (including adjusting the angle of table saws, miter saws, band saws, etc.). Colour: black Material: plastic Size: 230x35x22mm Package Contents: 1 * Digital Angle Finder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.