ALESIS MultiMix 4 USB Audio Interface Built-in 4-channel mixer Operation confirmed. Both the mixer and interface work normally, but please be aware that there may be some crackling when turning the knobs. Manual, AC/AC power adapter and USB cable are not included. Only what is shown in the pictures is included. Shipping costs are covered by the seller. Brand: Alesis Number of Channels: 4 Product Dimensions: 19.7 depth x 15.2 width x 5.1 height cm Item Weight: 2.42 pounds Connectivity Technology: XLR, USB, Interface Thank you for viewing.