HQRP AC Adapter/Power Supply Cord compatible with Maxtor Personal Storage 3100 HDD 80GB / 100GB / 200GB / 250GB External Hard Drives Coaster HQRP&reg; AC Adapter with Power Cord plus HQRP&reg; Coaster; Output Voltage: 12 Volts, 5 Amps; Power: 60W; Safety Features: High Efficiency and Reliability; Automatic Overload cut-off; Automatic Thermal cut-off; Short circuit and Over Voltage protection; Low Interference & Noise. 200 days warranty!