HQRP AC Adapter for Western Digital WD My Book WDBFJK0020HBK / WDBFJK0030HBK / WDBFJK0040HBK ; 2TB / 3TB / 4TB External Hard Drives HDD Power Supply Cord plus HQRP Euro Plug Adapter HQRP&reg; Wall AC Adapter plus HQRP&reg; Euro Plug Adapter; Input: AC 100V - 240V; Output: DC 12V; UL Listed; 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!