Marinco Dual USB charger

The combination Dual USB features two ports to charge cell phones, tablets and other devices powered by USB's, a blue LED to show that power is available, and a cover to prevent water and dirt from entering the ports.
The Dual USB has a 12 to 24 Volt input with a 5 Volt output, a total of 2.1 amps output between the two ports. 

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https://octopart.com/12vdusb-b-marinco-74147290#