Electro-adhesion holds notices, reminders, illustrations or training materials on the triple-function whiteboard surface without pins, tape, glue or magnets. Whiteboard can be used as a dry-erase board that doesn't ghost or stain. Lift the clear overlay and place papers on the white surface for use as a bulletin board. Use a dry-erase marker on the clear overlay to interact and illustrate ideas without marking the original items under the overlay. Board is powered by four AA batteries (sold separately) or Justick AC adapter (sold separately).