... SizeStandard size:30″ ~ 100″ ; Customized size:30″ ~ 110″ConstructionFrame: aluminum, die-cast zincPCB: FR4 fiberglass printed circuit boards, tempered glass, etc. PC ... , contact discharge 8 kV, air discharge 15 kV on USB connector pinsEMCCE,FCC Class B,EN55022,EN55024,CISPR22,CISPR24InterfaceUSB 1.1 ...