I have managed to contact the maker of the vibrating pen. They will be sending me literature describing the device. It is unfortunately quite expensive <groan>, as Barb would say. The "Dynamic Loader" is the battery charger. Quote: The Liner is available today. For the USA we have a problem as the Dynamic Loader is only suitable for 220-240 volt, 50/60 Hz. We are working on this problem at the moment. The Liner including the Loader cost US $ 150,-- free on board Dokkum The Netherlands. Shipping costs between US$ 15 and 24. Unquote. K-F Etzold IBM T. J. Watson Research Center 914-945-3816 914-945-2026 Fax