The Netgear Nighthawk CM1000, certified by Comcast and Cox, is a DOCSIS 3.1 Cable Modem with the latest bandwidth technology for Gigabit cable speeds (superior to DOCSIS 3.0). This helps to smoothly stream HD videos, download files, and game online. An Xfinity Blast or Extreme internet plan is ideal for this modem. The CM1000 is also backwards compatible with previous DOCSIS standards, but is also prepared for any future upgrades. It comes with 2 Gigabit Ethernet ports, a 1-year limited warranty, IPv6 support, and a WAN coaxial cable port. The product measures 8.8 x 3.4 x 5.9 in and weighs 1 lb. A quick-install guide is provided in the box, along with a power adapter and ethernet cable.