With a 16A IEC 60309 type plug as used on caravan and camping sites this would be a good distribution unit for use in a tent, it lifts the sockets off ground level but the 2 meter included cord is rather short and as supplied it has a 13A plug, but since using rated 16A 250V no reason it could not supply 4000W.
However using as the advert implies at 110 volt I would say is ill advised and also "Four USB charger: including a high-power one for iPad and other power-hungry devices." is not really good enough it should state the USB version and current output not simply "high-power".
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