Detailed Product Description 1.Red laser pointer, page up and down, and flash memory2.capacity range:128/512/1GB/2GB/4GB3.Output power:classII<1mW&ClassIII<5mW4.Battery:3pcs AG135.IR(Infrared technology)system:windows98/2000/ME/Linux/Macosit suppport word, excel, powerpoint, ACDsee,Acrobat readerit mostly be used in Presenter, such as meeting, speech, training. teaching