The USB2AAEXT20M 20-m active USB 2.0 extension cable has a USB A connector and a USB A port and provides active extension of the range of USB 2.0 devices up to 20 m. The active USB 2.0 extension cable is an all-in-one cable designed to overcome distance and power source limitations, and includes bus-powered active circuits to ensure performance beyond the length limitations of standard USB cables. And you can daisy-chain two cables for a total USB extension of up to 40 m. If necessary, the USB device can be powered from the supplied universal power supply unit and a wall socket.