The Atomos Powered Docking Station with USB 3.0 & 2.0 is a A low-profile offload dock for your Atomos drive caddies, supports a single drive caddy at a time and efficiently offloads the drive contents direct to your computer via an integrated USB cable. Both Master Caddy and Master Caddy II models are supported. This powered model is an upgrade over the previous Atomos USB 3.0 docking station, additionally featuring support for an Atomos RAID Caddy power cable for if you ever need to connect a RAID caddy. The integrated USB cable features one USB 3.0 and one USB 2.0 connector, with the latter provided for compatibility with older computers. Older computer models may require both ports to be connected for a sufficient supply of power.