This is a Mackie ONYX BLACKBIRD. It was working in a Windows 11 environment until recently. I will include the main unit, the PCIE FireWire card, FireWire cable, power cable, and the manual. It has 8 channels + ADAT in, and the 8-channel ONYX mic preamps are high quality. Channels 1 and 2 can bypass the preamp circuit, making it convenient for recording with outboard gear. I'm selling it because I purchased an RME UCX II after switching from a UA Volt to this unit. I think the mic preamps and the sound quality were quite good.