The design of this LAMY digital pen is based on the LAMY AL-Star rollerball pen and features the metal clip. Endowed with Wacom’s patented EMR technology, the LAMY AL-star black EMR doesn’t need a cord or battery to function, and never needs to be charged. There is no difference from traditional writing instruments in terms of haptics, ergonomics and usage, so no retraining is necessary. This is the POM nib which is best suited to matte surfaces as it's quite a rounded nib. This LAMY digital pen is under two year warranty.