Arris touchstone XBB1-a Battery backup devices For XB6 cable modem 57WH 8.4VDC

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ARRIS SB6190 Cable Modem - Fast DOCSIS 3.0 32x8 Gigabit Cable Modem For Xfinity

Arris TM822R DOCSIS 3.0 Voice Cable Modem w/ Backup Battery – Used, Great Shape