I am selling this item because I temporarily need funds. This is a stereo Vari Mu compressor, an outboard device that enriches sound. I used it as a master compressor. If the compression feel doesn't suit you, the color switch is convenient for bypassing the compression and only using the tube coloring. It has some signs of use, and the L-side sidechain switch is a little loose. The only included accessory is a 3-pin power cable. Attack and release are variable. Sidechain options are 120Hz and 60Hz. Regarding Tegeler Audio products, there have been reports of counterfeit products circulating on overseas forums, but this unit has been confirmed as genuine by checking the serial number with Tegeler Audio headquarters. If you wish, I can attach an image of the confirmation email from the headquarters after the purchase, so please rest assured. Thank you for looking. #TubeCompressor #DTM