This is a compact analog mixer with an audio interface function. (You can change the input/output settings with dedicated software for PC/Mac, and it can also be used for streaming.) I haven't used it much, so I think it's in relatively good condition. AC adapter included. (Manual and original box are not included) - Model Name: NOTEPAD-5 - Number of Channels: 2x2 - USB Connection: Yes - Monitor Output: Yes - Power: DC 12V - Master Output: XLR output - Level Adjustment: Yes - Audio Input: 2 channels Thank you for looking.