Mouse Included: Yes Tracking Method: TrackBall Palm Rest: N/A Normal Keys: 89 Hand Orientation: Right Features: Designed for Windows Built-in trackball for mouse emulation 88/89 keys keyboard with embedded numeric keypad and 12 dedicated function keys Trackball: Resolution: 200 DPI (X, Y Axis) Signal output: Shift Sin wave (X, Y Axis) Phase shift: 90 + 45 degrees Tracking speed: 250mm/sec