The ARRIS SURFboard SB6141 Cable Modem supports Internet download speeds up to 343Mbps and upload speeds up to 131Mbps based on your cable provider service. If you feel the need for speed, this is your modem. You'll enjoy optimum viewing of HD video streaming and music. Quick Downloads of large music, video, photo and data files are the norm - based of course on your provider service. Online gaming? Simultaneous use of multiple devices like PC's, gaming consoles, smartphones and tablets? Not a problem. The SB6141 can access the fastest plans of your cable Internet provider. Installation couldn't be simpler. Requires cable Internet service and actual upload/download speeds depending on your ISP plan.