http://saleadapters.com/new-12v-1a-motorolaarris-sb6120-sb6121-sb6141-sb6180-modem-ac-adapter-p-7837.html
NEW 12V 1A Motorola/Arris SB6120 SB6121 SB6141 SB6180 Modem AC Adapter

Specifications:

MODEL: SB6120

INPUT: 100-240V ~ 50/60Hz 0.5A

Output :� 12V 1A

Packing list:
1 x� AC Adapter� Power Adapter