Bump Bead Pen / Bump Bead Pen

This kind of pen ,with a brand -new using method,
has two iron beads inside,his design inspiration comes
from the iphone gravity induced game.When the beads move up and
down,the gravity will be changed into power to bump the
on-off so as to decide whether to open the on-off or not. This new
on-off method will bring you a refreshing experience.