Cable Matters (UL Listed) AC Power Adapter (5V/2A) AC POWER ADAPTER provides power to a USB extension cable or electronic device with a 5 volt / 2 amp power rating and a 3.5mm barrel connector with center positive polarity REPLACEMENT AC POWER SUPPLY is rated as an Information Technology Equipment (ITE) power supply that supports the type of power that your extension cable or electronic device requires PREMIUM CONSTRUCTION 5V/2A adapter includes a 4 foot 7 inch (55 inches) cord with a ferrite to prevent electrical noise interference with your device; Double insulation design helps protect against electric shock; Connects to a standard 120V AC outlet receptacle UL LISTED SAFETY with a lifetime warranty and product support provides peace of mind when purchasing COMPATIBLE with the Cable Matters SuperSpeed USB 3.0 Type A Male to Female Active Extension Cable, the 3x1 Port HDMI Switch and many more tablets and devices that require 5V/2A