This thing is awesome! It's really small and portable, but it's strong. It holds a charge for a very long time, it charged my 2 person kayak... and then deflated at the end of the day and wasn't even down one of the 4 power bars. It fit right into my backback and I was able to shove it into the kayak until the end of the day.
It comes with multiple tips that cover just about any inflatable you could have (rafts, floaties, beach balls, mattresses, etc.). It inflates as well as deflates, which is great.
I highly recommend this!