The UAD-2 Satellite Thunderbolt OCTO Ultimate 4 is Universal Audios most powerful DSP accelerator, combined with a flagship collection of 83 UAD Powered Plug-Ins. This sleek desktop unit is compatible with all Thunderbolt-based Macs, and can supercharge Apollo interfaces and other UAD-2 DSP Accelerator systems to run larger mixes filled with rich analog emulation plug-ins.Universal Audio