Product details:

The Digi-Pro 12"/300mm electronic protractor includes embedded magnets easy measuring ferrous metal surfaces. On/Off, Zero, Hold and Reverse feature to invert the display for easier reading in certain situations. Embedded 25 lb. pull magnets Full, 360° measuring range Accuracy: .2°± Repeatability: .05°± Resolution: .05° Invertible display feature Voltage: Standard 3V lithium battery