The HR-2 is a 4-bay card reader and storage drive hub with Thunderbolt 2 or USB3.0 connection to give maximum speed transfers to and from compatible computer. The HR2 hub has two Thunderbolt 2 ports and one USB 3.0 port, making it easy to daisy-chain with your existing setup. Two Thunderbolt 2 ports also allow you to place the hub anywhere in your lineup of other Thunderbolt devices.