Tooploo 2.5" 3.5" Dual SATA USB 2.0 USB 3.0 OTB/OTC 5 in 1 Card Reader HDD Docking Station This product with dual HDD bases supports high speed interface USB3.0 + Clone.Single base supports 3TB.It supports up to 6TB in total. USB2.0 standard speed:480Mb/s;Single-letter reader:Only one is allowed to read one card once. It can maximally read 2 sets 3TB SATA HDD with USB3.0 standard speed 5Gb/s. Product Dimension:148.00*112.50*80.00mm Output Interface: 480Mb/s(USB2.0);5Gb/s(USB3.0)