Super Power Supply&reg; AC / DC Adapter Charger Cord Plug 9V (1000mA) 1A 5.5mm x 2.1mm 5.5x2.1mm 9 Volt Adapter Voltage Input Range: AC 9V 1A NEW! Positive inside, negative outside. Super Power Supply AC adapters are made with high quality materials. Safety features against short circuit, internal overheating, incorrect voltage, 100% compatibility with the original. UL and FCC certified. Super Power Supply are manufactured and tested to match or exceed OEM products. Warranty: 1 Year Trademarked by Super Power Supply. Sold exclusively by Super Power Supply