Fangrui Product Details 1.four Channels One-way Xlr Audio Optical Fiber Mission, With A Default Distance Of 20km 2.high Speed Synchronous Digital Mission Technology 3.the Optical Dynamic Technology Is Adopted, And No Adjustment Is Required During Use 4.no Electromagnetic Interference, No Radio Frequency Interference, No Ground Current 5. Safe Mission In Harsh Electromagnetic Environment Audio Character Audio Input Impedance:10k Audio Output Impedance:600ohm Interface Mode:balanced Xlr Input/output Amplitude Ratio:1/1 Frequency Response:20hz-20khz Audio Sampling Rate:24bit/96khz Signal-to-noise Ratio: Equal 75db Audio Interface:xlr Optical Character Mission Wave Length:tx:1310nm,rx:1550nm Optical Interface:fc/sc(default Sc Standard) Mitting Optical Power:max 10db/20km Receiving Sensitivity:-35@155mb/s Optical Dynamic Range:-39db~-42db Optical Allowable Maximum Chain Loss:25db Mission Distance:20km(single Mode) Installation Process: 1,connect The Audio Signal Source To The Mission End Of Xlr Audio Fiber Extender; 2,connec