Photo 1 of 9V 2amp DC Power Supply, 9Volt 2000mA AC/DC Adapter, dc9v 2a Power Cord Adapter Plug 5.5mm x 2.5mm [The Polarity of Output tip: Inner Positive (+), Outer Negative (-)]

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Photo 1 of 9V 2amp DC Power Supply, 9Volt 2000mA AC/DC Adapter, dc9v 2a Power Cord Adapter Plug 5.5mm x 2.5mm [The Polarity of Output tip: Inner Positive (+), Outer Negative (-)]