Offers unlimited application for writing, marking and engraving on almost all surfaces without applying pressure. Easy to operate; hold the pen tightly on the surface, press the power button, let the tip rotate with high speed and provide a permenant inscription on the surface. The inscriptions and markings will not be effected by chemicals or sunshine and stay forever. Cordless battery power enables both indoor and outdoor applications. Operates with 2x”AA” battery which is not supplied with the pen.