* Mouse Dimension: 9.0x 5.2x 3.5cm

* Channel: 32 Channels automatically switch

* ID: Unique ID for mouse

* Radio Frequency: 2.4 GHz

* Operation distance: 10 Meters

* Key number: 3 Keys (wheel button on middle button)

* Battery: 2 x AAA ( Alkaline )

* Operation System: Win 98SE, ME, 2000, XP, XP x64, Vista