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Mini Size USB RF Wireless Keyboard with Trackball Mouse Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge Mini Size USB RF Wireless Keyboard with Trackball Mouse Brand new Mini Wireless USB 2.4G RF Office Keyboard+Trackball Wireless RF (radio frequency) 2.4GHz Operation distance: 10 meters ( 32.8 feet ) Power conservation mode during times of no movement PC USB connector Compatible with Windows 2000/XP/VISTA With slim link office keyboard Built-in trackball for optical …