control panel used stainless steel printing apply to outdoor and all kinds of public places can provide PS/2 or USB interface Technical/material parameters- Panel: Import high-strength stainless steel.- Keys: stainless steel tensile convex keys, chemical etching, imports color oil printing.- Boards: aluminum.- Track ball: wear-resisting stainless steel ball, mirror surface treatment.- Rotate: 360 degrees. Electrical properties- voltage:                                 5.0 VDC + / - 5%- current:                                 10mA- with emc standards:               EN55022 (B) :- track board resolution:            X > : 200dpi  Y: > 190dpi- service life:                            more than 2 millions.- track ball activation velocity:    60 - 100 G- electrical life:                         50,000 hours (power open)- operating temperature:          - 30 ~ + 85 Celsius degree- storage temperature:             - 40 ~ + 90 Celsius degreeReliability- MTBF:   >   20000h- MTTR:   <   30mPanel size:                            330mm*100mm