ARRIS SURFboard SB6183-RB DOCSIS 3.0 16×4 Cable Modem| Approved on Xfinity, Cox, Spectrum and most Docsis Cable Internet Providers| Plans up to 400 Mbps

APPROVED with Comcast Xfinity, Spectrum (Charter, Time Warner, Brighthouse), Cox and more. If not sure call your cable provider to find out if approved to use. REQUIRES Cable Internet Service.
Not compatible with: Verizon, AT&T, or CenturyLink
Cable Modem only (no WiFi router). NO support for Cable TELCO options
Internet speeds up to 686 Mbps on 16 Download Channels and 131 Mbps on 4 Upload Channels, based on your cable ISP subscription. Approved for plans up to 400Mbps. Gigabit Ethernet port to connect to computer or router
Great for streaming HD Video and gaming on multiple devices at a time
90 Day Warranty. ARRIS Certified Refurbished. US Technical support. ARRIS Certified Refurbished products will ALWAYS be branded ARRIS, Never Motorola! If you get Motorola branded product they are illegitimate, need to be returned to Seller and Reported to Amazon