ARRIS SURFboard SB6121 4x4 DOCSIS 3.0 Cable Modem Black

In excellent condition and works perfectly! Selling because we switched from Xfinity to Centurylink fiber. Compatible with MOST Major CABLE providers like Comcast/Xfinity, Cox, Time Warner, Mediacom, Bright House. Wired modem only, does NOT include WIFI Router or VOIP Telephone adapter. Gigabit Ethernet port to connect to computer or Router for fast downloads. Internet download speeds up to 172 Mbps and upload speeds up to 131 Mbps based on your Cable provider service. Good for streaming Video and gaming on multiple devices at a time. A new and improved version of the world's most widely deployed DOCSIS cable modems. For the residential cable subscriber who wants a powerful modem capable of delivering a high-speed data service at blazing fast speeds.10 / 100 / 1000 Base-T Ethernet Port (RJ-45). *Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm *Compatible with ALL Major CABLE providers like Comcast, Cox, Charter, Time Warner, Mediacom, Bright House Building upon the success of the SB6120, Motorola's SURFboard SB6121 delivers your complete personal media experience, at lightning-fast broadband speed. It harnesses the power of DOCSIS 3.0 technology to bond up to four downstream channels and four upstream channels--providing you advanced multimedia services with data rates of more than 100 Mbps in each direction. That makes gaming, shopping, downloading, working, high-quality voice and video conferencing, and peer-to-peer networking applications far more realistic, faster, and efficient than ever before.