idely used in the following fields:    
-Self-Service Terminals
-Info- Kiosk
-Medical devices(ultrasonics,etc)

specifications:
Key Travel:  2mm
Ball Diameter: 38mm
Ball material: stainless steel
Ball Color: Optional
Key switch lifespan: more than 3 M actuations
Trackball lifespan: >2M revolutions
Back Metal Cover: Rear side integrated electronics protected by a metal cover(Optional)
Actuation Force: 0.6N+/-0.1N
Mounting Rack: Aluminum alloy
Front panel:  104x75mm
Power supply: 5V DC+/-10%,
Protection level: IP65 static
EMC Standard: EN55022(B)
Power consuming: ≤1.00W(dynamic) ≤0.2W(static)
Contact Meterial: Gold/ Carbon
Operating temperature: -10 to +60 degrees
Storage temperature: -20 to +70 degrees
Operating RH: 30-90%
Atmospheric pressure: 60-106Kpa.
Reliability:  MTBF>20,000h;  MTTR<30min
OS: under DOS/Windows95/98/NT/ME/2000/XP, Microsoft PS/2 mouse compatible