All of us use a ruler, at one time or the other . But even measurements are not exactly easy to do, as they could require conversions and most of us forget conversion formulas as soon as we leave school.
Monocomplex Design Group has come up with a unique electric ruler. One side of the ruler is similar to a pen, while the other side is a ruler/converter. The base of the ruler is hexagon shaped and has measurements of inch, millimeter, centimeter, meter and a reset button.
There is an LED panel which gives the exact measurement to the user. The user can select which type of measurement (i.e mm, m, cm, etc) is required and then start drawing. From the moment the tip touches the drawing board, the ruler starts measuring. If the user makes a mistake, there is a reset button which can be used. A must buy for all those who have problems measuring.
Source: Free from Ruler