Bytecc T-305 Super Speed USB 3.0 & eSATA to Dual SATA III Docking Station with Stand Alone Duplicator Stand Alone Duplicator Supports LEDS for power and HDD activities indication Tool-less design for HDD installation, Tray less design - Fast HDD exchanging Complies with Universal Serial Bus 3.0 Specification Revision 1.0. Complies with Serial ATA International Origanization: Serial ATA Revision 3.1