65 keys Industrial Mechanical Keyboard, imported Cherry mechanical switch, with trackball Features· 65 keys Industrial Mechanical Keyboard, imported Cherry mechanical switch, with trackball· Water, dust ... : EN55022: 2006· EMC emission: EN55024: 1998 + A1: 2001 + A2: 2003· Mechanical trackball resolution: X:>200dpi, Y: >190dpi· ESD resistant: more than ...