A digitizer is a device that simplifies tracing of two-dimensional objects. The tablet consists of a wire grid network that receives a signal from the pen or cursor. The electronics connected to the grid translate that signal into precise absolute coordinate data that are fed to the computer. The computer’s software then interprets the coordinate data into an image that can be manipulated by the user to create the desired end product.                          
Digitizer's
Dimension Active Area inch/cm Precision
A00 42 x 60  / 106 x 152 0.008
A0 48 x 36  / 122 x 92 0.005
A0 48  x 36 / 122 x 92 0.008
A1+ 48 x 34 / 122 x 86 0.008
A1 36 x 24 / 92 x 70 0.005
A1 36 x 24 / 92 x 70 0.008
A2+ 30 x 20 / 76 x 50 0.008
A2 24 x 18 / 60 x 45 0.008
A3 18 x 12 / 45 x 30 0.008
A4 11 x 11 / 28 x 28 0.008