Analog mixer with built-in effects, 8 channels. Functionality confirmed, with only XLR inputs tested and working correctly. However, when the Effect switch is turned on, there is a hissing/buzzing noise even when the volume is not raised. The noise becomes less noticeable as the volume is increased, so I believe it should not be a problem for use. The effects themselves work fine. Regarding the power adapter, it requires a bit of a knack to screw it in, such as pushing it in firmly before tightening the screws, but once installed, there are no particular issues. There is no instruction manual. Only the main unit and power adapter are included. Thank you for your interest. - Brand: YAMAHA - Model: MG8//2FX - Number of Input Channels: 8 - Output Terminals: XLR, TRS - Power Adapter: Included - Effects: Built-in Effects - Number of Volume Knobs: 10 - Size: Compact Thank you for viewing.