main functions: 1.laser pointer 2.remote control function: page up/down ,black screen 3.ESC function( or F5) 4.usb flash memory stick function (512M,1GB,2GB...)---optional 5. all-in-one design Featu1.2.4GHZ radio frequency( RF) technology 2.remote control distances: 20m 3.no driver needed,usb plug and play 4.Wavelength: 650nm 5.Max output: < 1mW or < 5Mw 6.System: WINDOWS98/2000/ME/XP Linux & Mac OSres: