Universal DC Ind USB Hub Power Adapter This universal DC power adapter has been designed as an alternative, back up or replacement power supply for StarTech.coms line of industrial USB hubs. Compatible USB 3.0 Hubs 10-Port Industrial USB 3.0 Hub with External Power Adapter - ESD & 350W Surge Protection (HB30A10AME) 10-Port Industrial USB 3.0 Hub with ESD & 350W Surge Protection (ST1030USBM) 7-Port Industrial USB 3.0 Hub with External Power Adapter - ESD & 350W Surge Protection (HB30A7AME) 7-Port Industrial USB 3.0 Hub with ESD & 350W Surge Protection (ST7300USBME) 4-Port Industrial USB 3.0 Hub with ESD Protection (ST4300USBM) Compatible USB 2.0 Hubs: 7-Port Industrial USB 2.0 Hub ESD Protection & 350W Surge Protection (HB20A7AME) 7-Port Industrial USB 2.0 Hub with ESD & 350W Surge Protection (ST7200USBM) 4-Port Industrial USB 2.0 Hub with ESD Protection & 350W Surge Protection (HB20A4AME) 4-Port Industrial USB 2.0 Hub with ESD Protection (ST4200USBM) The external terminal power adapter can also be used with any other devices that can support 20V power supply including a variety of StarTech.com Ethernet Switches and Serial Adapters. The ITB20D3250 is backed by a StarTech.com 2-year warranty and free lifetime technical support.Please note this item is non-returnable, see our returns policy for more information.