1. to use the ARC port, your TV's port must support ARC functions.Qualified cable with ARC funtion is also needed.2. only one audio ouput is supported,namely the toslink/coaxial/L/R/Aux port can not work simultaneously3. This ARC adapter does not support CEC and you can not control the volume by TV remote control4. Input audio formats supported:LPCM / PCM5. when using the L/R or 3.5mm aux port,the audio format can only be 2CH like LPCM / PCM,all 5.1CH audio format like DTS,Dolby wont be working.Material:Aluminum alloycolour:BlackPackage Contents:1 x ARC Audio ConverterOnly the above package content, other products are not included.Note: Light 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.