· MULTI-GIG NETWORKING: The SURFboard S33 features a 2.5 Gbps Ethernet port plus an additional 1 Gbps Ethernet port for a 2nd network· Cable internet service required. Does NOT include Wi-Fi and does not support cable digital voice service.· DOCSIS 3.1 Cable Modem approved for cable internet speed plans up to 2.5 Gbps· 32 downstream x 8 upstream DOCSIS 3.0 bonded channels, 2 downstream x 2 upstream OFDM DOCSIS 3 1 channels· Connects to any existing Wi-Fi router for blazing-fast internet.· Compatible with major U.S. Cable Internet Providers including Cox, Spectrum, Xfinity & others.ice.· Stop renting your modem and save on monthly modem rental fees!· Sleek new, modern design fits nicely into home or office· Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers