Security-01 AC to DC 12V 0.5A 500Ma Power Adapter Supply, Plug 5.5Mm X 2.1Mm, F
Output: 12V DC 500mA. Product Usage Instructions: 1, Select a correct adapter tip for your device, this product tip is 5.5mm x 2.1mm. 3, Make sure your device's polarity is center positive (+). Output 12V DC 0.5A.