Guantai Video Fiber Optic Media Converters -Transmitter and Receiver, Singlemode 1310/1550nm Transmission up 20Km for CCTV Security System Video format compatible for PAL, NTSC, SECAM FC fiber port, Working firber :singlemode 0~20KM Wavelength : Single-mode 1310/1550m (9/125m) MTBF (Mean time between failure) over 100,000 Hours Lightning protection