A replacement or additional power supply for Western Digital My Book external hard drives and Seagate Expansion external hard drive. Manufactured by Ktec (Same as model as the original WD/Seagate External hard drive) WD / Seagate Certified Model# KSAS0241200150HU Input: 100 - 240V ~ 50-60Hz 0.5A Max. Output: 12V / 1.5A Watts: 18 watts WallWart, fixed US Plug Regulatory Approvals: GOST-R CE CSA UL Listed BSMI NOM NYCE C-Tick Safety Mark Nemko Semko Femko This power supply is compatible with the following storage systems. Seagate Expansion External Hard Drive WD My Book Essential (WDH1Uxxxx), (WDBAAFxxxx), (WDBACWxxxx) WD My Book Live (WDBACGxxxx) My Book Elite (WDBAAHxxxx) WD My Book for Mac (WDBAAGxxxx) WD My Book 3.0 (WDBABPxxxx), (WDBAAKxxxx) WD My Book Studio Edition (WDH1Qxxxx), (WDBAAJxxxx) WD My Book Studio LX (WDBACHxxxx) WD My Book Home Edition (WDH1CSxxxx) WD My Book Office Edition (WDH1Bxxxx) WD Elements Desktop (WDBAAUxxxx) WD My DVR Expander (WDG1Sxxxx), (WDH1Sxxxx)