Sabrent USB 2.0 Extender Adapter Over Cat5/5e/6/RJ45 (300-ft) Extension Cable WITH POWER ADAPTER(USB-RJC2) Overcome the length limits of USB cables with the Sabrent USB-RJC2 Use with mice, keyboards, and anyother device that has a USB plug. Included power adapter to power up Devices that require additional power. Connect USB devices up to 300 feet away to your computer by going over Cat-5/5e/6 patch cable. Reverse compatible with with usb 1.1/1.0