The device in question is a cordless, battery-powered pool cleaner designed for spot-cleaning and maintenance of swimming pools, spas, and hot tubs. It functions by creating suction to lift debris, such as leaves, dirt, and algae, from the surfaces of the pool and filter it into an onboard collection chamber.
Its utility lies in its ability to provide a quick and convenient method for removing localized debris without the need for connecting hoses or utilizing the main pool filtration system. This can lead to reduced energy consumption and less wear and tear on the primary pool equipment. Furthermore, it can be especially useful for cleaning hard-to-reach areas and smaller bodies of water. The design is a relatively recent innovation, arising from the demand for more efficient and portable pool cleaning solutions.