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Wireless USB Optical Mouse
Power : 2 AAA Batteries (not included)
System Compatibility: Windows 98 / ME / NT / 2000 / XP / Vista / Win 7 / Linux or Mac OS
Size:105 x 70 x 36mm
Note: The USB Receiver is packaged in the Mouse, open the battery cover then you'll see it.
Package: 1 x Wireless USB Optical Mouse1 x USB receive