F1CD Woodworking Electronic Goniometer 360 Degree Angle Detector Digital ProtractorOOTDTYFeatures: brand new and high qualityWell-made stainless steel rulers and la ser etched measurements offer clear reading and years' usage.Ruler and protractor combination for easy measuring inside and outside angles.High resolution of 0.1 and easily transfer miter angleswith no calculations.Can rotate a full 360 and with 0.3 accuracy.Zero Setting function and Automatically shut off in 5 min.Specification: Material: Stainless Steel PlasticLength: 130mm/ 5.1 inchRead value: 0.1Accuracy error: within 0.3Power supply: 3V( 1xCR2032)Package Includes: 1x Angle Ruler( battery excluded)note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item.