... ground pin• overload / overvoltage / short circuit protection• Comply with CCC, CE, FCC, GS, CB, UL, SGS certificationScopeWireless routers, switches, reading ... machines, e-books, digital photo frame, electronic tools, high-definition player, electric toys, advertising machine, air purifier, burglar alarm ... ResistanceDC500V 100M Ω(min)MTBF>20000Hrs USB 5W Power adapter CE SFN050100