Photo 1 of 9Volt DC Power Supply 1A 1000mA AC/DC Adapter, DC 9V 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 9Volt DC Power Supply 1A 1000mA AC/DC Adapter, DC 9V Power Cord Adapter Plug 5.5mm x 2.5mm [The Polarity of Output tip: Inner Positive (+), Outer Negative (-)]Photo 2 of 9Volt DC Power Supply 1A 1000mA AC/DC Adapter, DC 9V Power Cord Adapter Plug 5.5mm x 2.5mm [The Polarity of Output tip: Inner Positive (+), Outer Negative (-)]