NEMA 5-15 3.8kW charger??

Whats the deal with this charger?
https://www.amazon.com/dp/B01N7L1L8T?psc=1

It advertises 110-220v and 3.8kW (16A) output power from a standard 5-15 plug. How is that possible? isnt 5-15 always a 1…
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