Does what it's supposed to. I added one to my boat console in addition to my existing 12v car charger socket. Charges smartphones and Bluetooth speakers with no issues and fairly quickly. Not sure how it will hold up in wet salt water 6 months out of the year but we'll see. Corrosion shouldn't be a big problem for the rubber cap that goes into the ports. Apparently the bottom output is 2.1A.
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