Features: 1.Keep data: It can be locked at any angle to help you keep data when using it. HOLD/Rev button: keep measuring angle. 2.Measuring range: 0-360 ° overall measurement. 3.Double scale: Stainless steel ruler with Inch and millimeter scales. 4.On/off button: press and hold the on / off button to turn off the power supply. Auto power off. 5.Material: Made of stainless steel, . Clear and wear-. Specifications: Material: stainless steel, Color: silver Types: A(0-200mm), B(0-300mm) Degree: 0-360 degrees Battery: 3V Button Battery(included) Accuracy: ± 0.3 degree Resolution: 0.05 degree Waterproof: IP54 Size: (Approx) A - LxW 217x35mm/8.54x1.37inch B - LxW 317x35mm/12.48x1.37inch Package Included: 1 PC x Digital Angle Meter