16x4 DOCSIS 3.0 cable modem plus a built-in AC1900 Dual Band (2.4 GHz and 5 GHz) Wi Fi Gigabit Router with four Gigabit (Gig E) Ethernet ports, a firewall DFS, Power Boost, and more. This product is recommended for actual cable Internet service speeds up to 375 Mbps. A Broadcom cable modem chipset provides security from Denial of Service attacks. Wi Fi performance is exceptionally good, even in multi-dwelling units with lots of Wi Fi noise from neighbors. DFS and Power Boost are key Requires cable Internet service. Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, Suddenlink, WOW, Cable One and other cable service providers. Eliminate cable modem rental fees up to 156 dollars per year. (Savings are shown for Xfinity and vary by cable service provider. No cable modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT & T, Century Link, Frontier, and others. Model MG7550 has no phone jack.)