The Zoom Model 5341J cable modem meets the cable industry's DOCSIS 3.0 standard for speeds up to 343 Mbps, and also works with lower-speed DOCSIS 2.0 and 1.1 services. And with IPv4 and IPv6 networking support, this is a product designed and built for use today and for years to come. The Model 5341J has been tested and certified by CableLabs® to work with nearly all U.S. cable service providers. Additonal testing and approvals have been obtained from Comcast, Cox, Time Warner Cable, Cable ONE and other cable services. The fast 10/100/1000 Mbps Ethernet port connects to your Windows or Macintosh computer, router, wireless access point, HomePlug adapter, or other Ethernet-enabled device The Model 5341J can also be plugged into routers and routers with wireless capability for sharing of your high-speed service with multiple devices. With its easy installation, high speed, and broad capability, the Model 5341J is the perfect choice for almost any cable modem user.