3 products in 1:  Modem?? N300/N300 Dual band WiFi and 4 Port Gigabit Router</br>Requires Cable Internet Service.  Approved on Comcast Xfinity?? Charter?? Time Warner?? Brighthouse Networks?? Cox?? Mediacom and almost all Regional Cable Internet Providers for plans up to 100 Mbps.  Not compatible with Verizon?? ATT or Centurylink.</br>Docsis 3.0 Modem with 8 DOWNLOAD and 4 UPLOAD Channels capable of 343 Mbps download and 131 Mbps.</br>N300 2.4Ghz + N300 5GHz WiFi Router and 4 Gigabit Ethernet Ports</br>BROWN BOX Models Not Valid for This Item When Sold As New?? Should Report to Amazon Immediately and Return to Seller; 2 Year Limited Warranty with US Technical Support.</br></br>Product Description</br></br>The SBG6580 SURFboard Wi-Fi Cable Modem Gateway ena