RF WIRELESS SLIM KEYBOARDERGONOMIC DESIGNBUILT-IN OPTICAL TRACKBALL & HOT KEYS FOR INTERNET & MULTIMEDIA FUNCTIONS2.4 GHZ ISM BAND8 CHANNELS WITH 4096 IDS TO AVOID INTERFERENCERANGE UP TO 40 FTADVANCED POWER SAVING MANAGEMENTON/OFF BUTTON FOR SCROLLING FUNCTIONFOLD-DOWN FEET PROVIDES KEYBOARD TILT FOR TYPINGRECHARGEABLE BATTERIESCOMPATIBLE WITH WINDOWS ME/2000/XP/VISTA & MAC OS 10.2 & ABOVECE & FCC APPROVEDUPC : 768267091680Shipping Dimensions : 14.00in X 6.60in X 2.00inEstimated Shipping Weight : 1.75