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19V 2.1A 40w AC Adapter Battery Charger for Harman Kardon Onyx Studio 3 Wireless speaker NSA40ED-190200 Power Supply - AliExpress
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Amazon.com: Battery Replacement for Harman/Kardon HKOS6BLKSG HKOS6GRYSG Onyx Studio 5 Onyx Studio 6 ID997 : Health & Household
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