Wireless Laser Pointer Presenter, USB Laser Pointer Portable with keychain ClassII&ClassIII Red Laser Pointer, page up/down USB Laser Presenter with page up and downSize:90*30*5mmBatteries:1pc CR2032Material: ABSOutput Power:ClassII<1mW&ClassIII<5mWWavelength:650nmLogo: print availableFunction: red laser pointer, page up and down, black screenIt supports word, excel. powerpoint, ACDsee, Acrobat ...