Automatic power off: With automatic power off function, save energy consumption, extend battery life. Intuitive reading: The large digital LCD screen is easy to read. Suitable for measuring inside and outside. Easy to measure: Digital stainless steel ruler and angle finder combo makes measurements for easy woodworking.  Easy to operate: You can hold an angle setting at any desired angle. Reset button for zeroing at any angle for relative measuring. Cm and inch scale: The scale of the ruler is cm and inch scale, so it is durable and easy to read.   Hold button for holding the angles any times which do not worry about data deviation.   Specifications:  Material: Stainless Steel Blade  Color: Black  Battery: 1 x Button Battery(built in)  Angle Measurement Range: 0-360 Degrees  Resolution: 0.05  Error: Plus Minus 0.4  Product Size(about):   Blade Width(about): 27mm  Thickness(about): 1.2 mm    Package Included: