Connection and operation: 1. Connect the ARC or TV port of the converter to the -compatibl or ARC port of the TV through an cable.Note: Please connect to the interface with the "ARC" mark! Otherwise, audio output cannot be obtained 2. You can also connect the optical interface of the converter to the optical interface of the TV through an optical fiber cable.Use optical fiber cable, coaxial cable or cable and 3.5mm audio cable to connect to the power amplifier system. 3. You can also use an -compatibl cable to connect the ARC or Sound Bar interface of the converter to the Sound Bar. 4. Connect the USB power supply cable to the DC 5V interface of the converter.Turn the power switch to the ON position. 5. Switch to the corresponding channel by flipping the switch. This -compatible audio return and audio converter can return the sound of a TV that supports ARC function to the adapter's ARC loop output interface, optical fiber, coaxial, and 3.5mm headphone jack output through the -compatibl or ARC interface. This product is very suitable for home theaters, teaching, training structures, conference rooms, home appliance stores and other places. 1. Support -compatibl ARC, optical input switching function 2. Supports ARC, optical fiber, stereo, and 3.5mm stereo headphone output at the same time 3. 3.5mm stereo headphone jack equipped with high-performance audio amplifier 4. Supports transmission of 192KHz audio sampling rate 5. Optical fiber and ARC output interface support 5.1 channel transmission 6. Support optical fiber or ARC input, optical fiber, ARC output (signal pass-through) 7. ARC, and 3.5mm headphone output volume can be controlled through the TV (CEC) 8. Support volume memory Material: abs colour: Black Package Contents: 1 x Audio returner 1 x USB cable 1 x Optical fiber cable 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.