YAMAHA ADDA96 Analog Input/Output Expansion Board - Brand: YAMAHA - Model: ADDA96 - Function: Analog Input/Output - Application: Expansion module for PA mixers For reference, here's a link to the manufacturer's website: https://jp.yamaha.com/products/proaudio/interfaces/analog_cards/index.html This was included when I purchased a Yamaha digital mixer. I am selling it as I have not used it. I have not been able to perform a detailed check, so please understand that it is non-refundable and non-returnable. The included items are all shown in the photos. Thank you. Mini-YGDAI card