1.solar logo pen . 2.infared technology . 3. laser pointer ,page up and down ,solar logo pen .any ... solar logo pen .Technology :infared technology .Function :Laser pointer ,page up and down ,laser presenter with solar logo pen .Any trade mark ... memory (optional).Control distance :15m.Laser distance :200m.Laser output:<1mw(class II),<5mw (Class III).Laser wavelength:650nm. Material :Brass .Battery ...