Submersible pump. 396 Gallons per hour, 25 W motor, 1.5M=4.9 ft power cord.
Possible homebrew uses: Recirculating draft line cleaner build or as part of a recirculating wort chiller setup.
I use a similar (completely different model and manufacturer) in my Recirculating Draft Line Cleaning Build.
Update: Since this post was published the price, availability or promotion has changed. Check the product page for current description, price and availability. Also: Today’s Deals on Amazon
More: Recent Amazon Finds