Rosefray 18V 1A AC Adapter Charger for Bose SoundDock Series 2, 3, II, III, 310583-1130, 310583-1200 Music System PCS36W-208 : Wireless Speaker Power Supply With US Cord SoundDock 2, 3 compatibility ONLY ! This is +/-18V Barrel Tip AC Adapter, not 20V. Please check your requirement. If you need 20V AC Adapter, Please DO NOT buy this item. Thanks ! Output: +/-18V 1A((Does Not Fit Soundlink) Compatibility:This product has been tested and validated to ensure it will work with for Bose SoundDock Series 2, 3, II, III, 310583-1130, 310583-1200 Music System PCS36W-208 We focus on providing quality power products and excellent customer service . Rosefray Products are CE, FCC, RoHS certified for safety. Warranty: 30 Days Money Back Guarantee / 24 Months - Free Exchange (Rosefray pays for shipping) / Please contact us with any questions or concerns - we are here to help! Rosefray ac adapters manufactured with the highest quality materials and include laptop safeguard features against incorrect voltage, short circuit, internal overheating. 100% compatibility with the original.