Replacement 36W AC Adapter for Western Digital External Hard Drives My Book Studio Edition II: WDH2Q10000, WDH2Q20000, WDH2Q40000, WDH2Q10000N,	WDH2Q20000N, 	WDH2Q40000N, WD10000H2Q-00, WD20000H2Q-00, WD40000H2Q-00, WDH2Q10000E, WDH2Q20000E, WDH2Q40000E, WDH2Q10000A, WDH2Q20000A,	WDH2Q40000A, WDH2Q10000S,	WDH2Q20000S, WDH2Q40000S, WDH2Q10000J, WDH2Q20000J, WDH2Q20000J, WDH2Q10000K,	WDH2Q20000K, WDH2Q40000K, 100% Compatible Part #: DA-36G12 AC, DA-36J12 AC, DA-42J12 AC, DA-48M12 AC, S040EM1200300, WD Part#: WDPS033RNN, WDPS039RNN. ***COME WITH MICROFIBER ADAPTER POUCH!! "STONE POWER EXCLUSIVE"***