ARRIS Surfboard Docsis 8X4 Cable Modem / Telephone Certified for XFINITY - Download Speed:  343 Mbps (TM822R)
Brand: ARRIS
Color: Black
Compatible with Xfinity Voice & Internet Service Download speeds up to 343 Mbps.
DOCSIS 3.0 Cable Modem. 2 Year Warranty
Eight download and four upload channels.
Battery back up capable (battery not included)
2 carrier-grade Voice over IP (VoIP) Lines