RC Laser Pointer with antenna RCIR-015 Name: RC Laser Pointer with antenna Size:155*10(Dia)mm Batteries: 4pcs LR41 Material: Brass Output Power: ClassII<1mW&ClassIII<5mW Wavelength:650nm Logo: Print available Function: red laser pointer, page up and down, black screen, teaching bar, ball pen System: windows98/2000/me/xp/Mac os It supports word, excel, powerpoint ,ACDsee, Acrobat Reader