Thank you for viewing. This is a YAMAHA Steinberg MR816CSX audio interface. It supports analog 8in/8Out, 24bit/96kHz. For this listing, I have confirmed that all buttons on the front panel are working and the LED lights are on. I do not have an operating environment, so I have not tested the connection with a host, etc. It was used normally on MacOS until just before removal. Included accessories are the AC adapter and Firewire cable. Please refer to the following for drivers: Windows https://jp.yamaha.com/support/updates/yamaha_steinberg_fw_driver_win64.html Mac https://jp.yamaha.com/support/updates/yamaha_Steinberg_fw_driver_mac.html Japanese Manual https://download.steinberg.net/downloads_hardware/MR816/MR816_documentation/MR816_OperationManual_ja.pdf Regarding the appearance, there are scratches and signs of use commensurate with its age, so please check the images before purchasing. This is a multi-functional product, and I cannot support everything, such as compatibility with the host, so I will only provide a warranty for fatal cases where the power does not turn on.