1.Four channels one-way XLR audio optical fiber transmission, with a default distance of 20KM 2.High speed synchronous digital transmission 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 transmission 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 Transmission wave length:TX:1310nm,RX:1550nm Optical interface:FC/SC(Default SC standard) Transmitting optical power:Max 10dB/20KM Receiving sensitivity:-35@155MB/S Optical dynamic range:-39dB~-42dB Optical allowable maximum chain loss:25dB Transmission distance:20KM(Single mode) Installation Process: 1,Connect the audio signal source to the transmission end of XLR audio fiber extender; 2,Connect the receiving end of XLR audio fiber extender to the audio and power amplifier; 3,Connect the optical fiber interface between the sender and the receiver with one optical fiber cable; 4,Connect the sender and the receiver to the power supply. When the indicator lights up normally, the system operates normally Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC100-240V Colour:As Shown Material:metal+plastic Package Contents: 1 x XLR transmitter 1 x XLR receiver 2 adapter 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.