Elegant is the only way to describe this pen-laser-stylus combo. This unique device boasts sleek lines, matt-silver finish and functions beautifully as three instruments in one. One end of the unit projects a brilliant laser beam up to 2000 feet. The 645 nm diode generates a beam bright enough to reach any corner of the largest auditorium. The other end is a quality ballpoint pen that can be changed to a handy PDA stylus with a twist of the barrel! Pen refills can be obtained from most office suppliers. This 3-in-1 Combo instrument comes in a durable, easy to open and close metal case and makes a thoughtful gift. Uses 3 LR44 readily available button batteries (included).