Funtions:Laser pointer,page up and down,blank screen,Esc, ... memory optional(64MB-16GB) Con Technology:Radio Frequency.Funtions:Laser pointer,page up and down,blank screen,Esc,power ... Contronl distance:15m.Laser distance:200m.Laser output:<1mw(ClassII),<5mw(ClassIII).Laser wavelength:650nm.Material: plastic.Dimension:11.2*2.6*1. ... system: Windows98,Se,Me,2000,XP,MacOS,Linux,Vista. 2.4G wireless presenter