NETGEAR C6300-100NAR DOCSIS 3.0 WiFi Cable Modem Router with AC1750 16x4 Download speeds. Certified for Xfinity from Comcast, Spectrum, Cox, Cablevision & More (Pre-owned),black Two-in-One DOCSIS 3.0 Cable Modem + WiFi Router delivers 16x4 AC1750 WiFi and up to 680Mbps modem speed. Advised to call ISP to get their MAC ID set if not auto-detected. Recommend the product to be placed closer to the cable line for better wifi signal. Certified to work with fast internet speed tiers of Cable Internet Providers like XFINITY from Comcast, Time Warner Cable, Cox, Cablevision, Bright House Networks, & More (Not Compatible with Cable Bundled Voice Services) Required for fastest Internet speed tiers offered by XFINITY from Comcast, Time Warner MAXX and Cox Premier & Ultimate Netgear Refurbished product may have a removed serial number. You will need to state the product is refurbished (state the full part number) if emailing customer support. See the attached (image) flyer to obtain the Serial Number and MAC Address information that maybe needed by your Cable provider before contacting them. Comes with Netgear C6300 DOCSIS 3.0 wifi cable mode router with AC1750 and DC Power adapter.