... UL mark, Date code Wrap and twist board <0.6% Output with 100% visual inspection and E-test Workmanship compliant with ... ISO9001: 2000 ROHS Compliant1Layer1-22 layer2MaterialFR-1,FR-2,FR-4 ... ,fire alarm,CCTV, wireless communication,telecommunication, networking, printer and house controller 2 Layers and 2.5oz PCB with E-Test(PCB board )