Challenger Cable Sales ITE # HK-HA-U12 Power Adapter 12VDC 0-2.0A (works great for MAXTOR Pers. Storage 3200 external hard drives) Output: 12.0VDC / 2.0A. (SET AT 1.83a) Positive tip. Regular barrel Input: 100-120VAC UL Standards for Safety DC PLUG 2.5/5.5 mm