Measure 360 And Hold Data Protractor Measuring Range: 0-999.9; Resolution: 0.05(3'); Accuracy: 0.5; The Goniometer, Can Measure 360Inner And Outer Angles, Supports Degree And Degree/Minute Unit Conversion. It Has Hold Button And Zero Button. To Lock The Data, Please Press The Hold Button. (Turning The Knob Is Only For Loosening And Tightening, Can'T Fully Fix The Angle 4 In 1 Multifunctional Digital Goniometer: This Product Is A Combination Of Protractor, Spirit Level, Level Circular Bubble And Ruler.It Is Calibrated By 3 Bubble Levels.Help You Measure The Angle Better.(Note: This Is Not A Digital Level, No Numbers Are Displayed On The Lcd Screen, Do Can Judge That If The Object Is Tilted).The Main Ruler Is Dual Scale In Metric And Inch.Large Lcd Display And Auto Power-Off: This Protractor Has A Large Full-Screen Lcd Display Which Allows You To Read Data Easily And Quickly.The Digital Angle Ruler Automatically Turns Off After 5 Minutes Of Inactivity To Save Power.The Digital Protractor Also Has A Zero Button That Can Be Reset To Zero At Any Time. Any Position And Suitable For Absolute And Relative Measurement.High Quality Material And Portable Design: The Thickened And Widened Ruler Body Is Made Of High-Strength Nylon Fiberglass Construction Material, Which Has Good Hardness, Wear Resistance, No Deformation, No Scratches, Lightweight And Durable 230Mm, Small, Delicate Design, Easy To Use And Carry. Hanging Hole Design Is Convenient For Hanging.Wide Range Of Applications: This Angle Measuring Tool Is Widely Used In Carpentry Furniture, Building Decorations, School, Home Renovation , Mechanical Processing And Other Fields (Including Angle Adjustment Of Table Saws, Miter Saws, Band Saws, Etc.) Package Contents] 1 Digital Angle Finder, 1 Cr2032 3V Battery, 1 Instruction Manual. Passed Ce And Fc Certification.