TP-Link DOCSIS 3.0 (16x4) High Speed Cable Modem, Max Download Speeds of 686Mbps, Certified for Comcast XFINITY, Time Warner Cable, Cox Communications, Charter, Spectrum (TC-7620) Eliminate Rental Fee: Eliminate your cable modem monthly rental fee Cable Modem Only: You will also need a router to enable Wi-Fi. Channel Width : 96MHz(16 channels) / 6MHz (single channel). Modulation : 64 QAM / 256 QAM Faster Speed: DOCSIS 3.0 Cable Modem provides 16X faster download speed than DOCSIS 2.0 for an ultra-fast performance; Channel bonding of up to 16 downstream and 4 upstream channels, provide data rates up to 680Mbps for download and 143Mbps for upload ISP CERTIFIED: Great for Cable Internet plans up to 300Mbps with XFINITY from Comcast, Spectrum (Including Charter, Time Warner Cable, and Bright House Networks), Cox, Suddenlink, Mediacom, and WOW Industry Leading Support: 2-year warranty and free 24/7 technical support; J.D. Power Ranked TP-Link "Highest in Customer Satisfaction for Wireless Routers in 2017"