Cannot connect via USB, so it cannot be used for streaming, etc. (I don't know the reason it broke. One day the connection became poor and it stopped connecting.) There are scratches on the bottom, but the front is clean. It has a richer sound than Yamaha, and the effects seem to be applied more beautifully than Yamaha. Accessories include the original Japanese AC adapter. 10-channel professional effects mixer with USB connection and a variety of built-in effects. - Model Name: ProFX10 v3 - Number of Channels: 10 channels - USB Connection: USB interface - Effects Engine: Built-in effects engine - Power Switch: ON/OFF switch - Main Out: Main out terminals - Connection Terminals: Line input terminals - Bottom: Non-slip rubber feet Thank you for viewing.