UpBright [UL Listed] New AC/DC Adapter For Western Digital External Hard Drives My Book Studio Edition II: WDH2Q10000, WDH2Q20000, WDH2Q40000, WDH2Q10000N, WDH2Q20000N, WDH2Q40000N World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. UpBright 30 days money back guarantee. 1 full year service warranty. Compatible Part #: DA-36G12 AC, DA-36J12 AC, DA-42J12 AC, DA-48M12 AC, S040EM1200300, WD Part#: WDPS033RNN, WDPS039RNN 12V 2A-3A 12VDC 12 Volts 2000mA-3000mA UpBright [UL Listed] New Global AC / DC 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