... -line, rotate, zoom in/out 2.Withstands severe environments 3.Stable, no-drif 2,4,6,10,16,32 points 32/42 ... minimum touch activation force is requiredMinimum Touch Object2.5 mm X 2.5 mmVandal-proofNo break by 1-pound steel ball ... (EN61000-4-2,1995 :Level 4)ControllerIntegration inside touch panelAgency ApprovalsCE, FCC, RohsOperating SystemOperation System Linux/ Dos / Windows 7/XP//Mac OS 2,4,6,10 ...