1,CE,ISO9001,fcc ATC certificate 2,10 year manufacture 3,3 ... 1% spare device 5,single-mode 20Km RS485/Audio signal Lightning Protector RS485/Audio Lightning Protection Device has IEC standard design. It ... novel.Ease of installation. Main Fine lines in the video signal-Surge / flow overvoltage protection, a road or road transport interface, fully ...