The Blackmagic Design Intensity Shuttle with Thunderbolt lets you accomplish one or more of four tasks -- grab footage out of a camera, pass it to a computer, adjust resolution up or down along the way, and, at the same time, or at anytime, connect to a top-quality HDMI monitor and perform color-correction in the best available resolution.
The transfer from the camera to the Shuttle is done through an HDMI cable, and from the Shuttle to the computer can also be by HDMI, but available on the Shuttle is a Thunderbolt port, which is an advanced data-transfer technology that with a 10Gbps capacity is extremely fast.
The Shuttle is a capture-and-playback device, more often referred to as an I/O device for its inputs and outputs. Aside from the HDMI and Thunderbolt connections already mentioned, the Shuttle also has analog video ins and outs, as well as HDMI and RCA audio ins and outs.
The Shuttle is portable, allows many conveniences in transferring footage, affords quality transfers, and delivers video to computers in codecs most recognized by popular editing systems.