Kensington Orbit Optical Trackball (64327) Brands_Belkin Both ports can function simultaneously

Both ports can function simultaneously with mixed or matched communication protocols

3x Data transmission Maximum data transfer rate 0

Operates on 12 different channels

deep black toner creates easy-to-read text and clear graphics

Windows XP x64

Kensington Orbit Optical Trackball (64327) Brands_Belkin Both ports can function simultaneouslyItem model number: 64327 Ambidextrous design for left or right handed users Left and right click buttons placed exactly where mouse user expect them Optical technology delivers superior precision PC and Mac compatible Professional and attractive silver and matt grey finish Two customizable buttons with Kensington TrackballWorks software Wired 180cm USB cable provides reliability and avoids need for batteries 5 Year warranty