The Go-Vac from Kokido picks up the dirt that settles on the floor of your pool. The unit has no motor of its own: you connect the hose to your filter pump, and the suction of that pump drives the cleaner through a diaphragm. It then works its way across the floor on its own.
A 6-metre hose comes with it, along with a pre-filter that holds back coarse debris such as leaves and twigs before it reaches the hose or the pump. Your filter pump needs a flow rate of at least 3 m³ per hour; the Go-Vac keeps working up to roughly 7.5 m³ per hour.
The unit is intended for above-ground pools with a soft wall and a flat floor, round or oval, up to 6 metres across. It works in rectangular pools too, but less thoroughly. The housing is plastic.
Useful if you currently walk the manual vacuum around the pool every week and would rather leave that job to the pump.