Sonnet Echo Express SE I TB3 PCIe, Desktop, 1 Slot handle bar Built in Auto Tracking technology automatically TCP LINK 4ATEM V1 Built in Auto Tracking technology automatically locks onto and follows presenters This compact system is packed with professional features including one button NFC Automatic Channel Setting mode and Auto Gain functions The Sonnet Echo Express SE I (Thunderbolt 3 Edition) is a compact desktop Thunderbolt to PCIe card expansion system that allows you to connect a single PCIe card to any computer with Thunderbolt 3 or Thunderbolt 4 ports and Linux and comes with a 2 year product warranty and free lifetime technical support