<https://www.factoryforward.com/product/12v-05amp-dc-power-supply-adapter/#product>
<http://schema.org/description>
"AC to DC Power supply for Arduino Uno, Mega and other Electronic boards that use DC Barrel Jack (5.5mm outer diameter)."
<https://www.factoryforward.com/product/12v-05amp-dc-power-supply-adapter/>