USB or PS/2 Trackball Keyboard Integrated 14 mm Trackball Low Profile (23,5 mm) Full Size Keycaps (19 mm) Scissors Balancing Technology Key Guiding HIGH QUALITY MINI DESK TRACKBALL KEYBOARDThe AK-4400-T Keyboard series is a high quality, high reliable small footprint notebook style keyboard with an integrated trackball. The high resolution 14 mm trackball allows smooth and accurate movement of the cursor. New scissors balancing key technology provides excellent key actuation feeling with soft tactile ergonomicScissors Balancing Technology improves off center key actuation characteristics. Low profile (23,5 mm) for rack implementation, kiosk applications and all other space critical applications. Compatible to many existing cutouts for similar keyboards with trackball. Keyboard Certification CE, FCC Key travel distance 2.5 mm Windows keys Yes Numeric keypad No Keyboard form factor Full-size (100%) Pointing device Touchpad Keyboard language UK English Keyboard key switch Membrane Device