Future-proof your internet and stop paying monthly rental fees. This unit is just over a year old and has worked for me flawlessly. I'm only selling it because I have moved to a mesh system. The ARRIS SURFboard SB8200 is a DOCSIS 3.1 modem – the newest technology being offered by cable providers. It is perfect for things like 4K Ultra-HD video streaming and Virtual Reality gaming. Plus, it has two 1-Gigabit Ethernet ports! Today's connected home demands speeds far more powerful than ever. Power your home network with the SB8200 and get the fastest speeds and most reliable connection to the Internet. Own yours today and stop paying rental fees. • DOCSIS 3.1 cable modem best for cable internet speed plans up to 2 Gbps • Compatible with Cox, Xfinity and other major U.S. cable internet providers • 32 downstream x 8 upstream DOCSIS 3.0 bonded channels, or 2 downstream x 2 upstream OFDM DOCSIS 3.1 channels • Two 1-Gigabit Ethernet ports capable of link aggregation Comes with DC power supply. Cash, Venmo, PayPal accepted. S&H to CONUS additional.