HighPoint RocketStor 5212 2 3.5 Drive Bays Thunderbolt Dual-Bay Thunderbolt Storage Dock (Mac Pro Support and Windows PC Support) Drive: SATA 6Gb/s OS Supported: Mac OS X Mac Pro Support and Windows PC Support Power Supply: Input: AC100-240V / Output: DC +12V 4.17A Dimensions: 5.31 L x 4.76 W x 2.83 H Package Contents: 1x RocketStor 5212 Storage Docking Device 1x Quick Installation Guide (QIG) 1x Power Adapter w/ Power cord