Features · 66 keys metal keyboard with trackball · Water, dust and vandal resistant · Etching and inking lettering · Brushed surface · Compatible with WINDOWS98/ME/2000/XP · Designed for public, outdoor, industrial and other extreme surroundings · Can be cleaned with soapy water, disinfectant or other cleaning agents · 1 year warranty, can be extended · CE , RoHS , FCC approved Dimension · Front panel: 392x110mm · Overall: 416x134mm · Trackball Dia.:38mm Material · Front plate: 304# Stainless steel · Keycaps: 304# Stainless steel · Trackball: 304# Stainless steel · Back plate: Aluminum alloy Mechanical · IP65 · NEMA4, IK7 · Key stroke travel: 2mm · Key actuation force: 120g/1.18N · Key durability: more than 1 million click times · Net weight: 1.6kg · Operation temperature: -10℃ to +50℃, can be extended to -40℃ to +80℃ · Storage temperature: -40℃ to +80℃ · Relative humidity: 30% to 95% · Atmospheric pressure: 50kPa to 110kPa Electrical · Power input: +5V/DC, 10mA · EMC emission: EN55022: 2006 · EMC emission: EN55024: 1998 + A1: 2001 + A2: 2003 · Mechanical trackball resolution: X:>200dpi, Y: >190dpi · ESD resistant: more than 8kV by air contact, more than 6kV by direct contact Free Options · Tackpad type (KY-PC-DT) · Most language layout · USB and PS/2 interface Upgrade Options · Optical trackall · IP67 type (View certification) · Extended operation temperature · Back light keys · Laser burnt lettering · Black color (KY-PC-D-BL) · Desktop type(KY-PC-D-Desk) · Extended warranty