The Motorola SB5100 Surfboard Cable Modem with AC Adapter is a high-speed cable modem designed for home networking and connectivity. With a maximum downstream data rate of 38 Mbps and a maximum LAN data rate of 100 Mbps, this black modem offers fast and reliable internet access. It features Ethernet and USB 2.0 ports for easy connectivity, making it suitable for use with PCs. The unit is unlocked and has a single Ethernet port, making it a versatile option for home internet access.