High accuracy 0.05, high resolution 0.01 Rechargeable Li-Lon battery. High resolution, professional measurement. Single and dual axis convenient to measure the angle. Dual and single axis with user-friendly LCD display angle. This axis digital angle protractor, you can measure the angle between two faces, not only in the earth direction of gravity. Press angle key on the first face, and then turn slowly and the rotation axis must be maintained around another test face, it will then point the angle as soon as you do not move the device. Each angle measurement is gyro technology. Specifications: Colour: red Accuracy: 0 to 20: (0.05). 20 to 70: (0.1). 70 to 90: (0.05). Single axis measuring range: 360, dual axis: 40 Resolution: 0.01 Response time: Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.