OPSON WL is the battery version of Optimus that can clean the pool floor, wall and waterline. It has a “build-in” lithium battery of 7800mAh realizing 120-minute cleaning. It is designed for both above-ground and in-ground pools of all shapes (rectangular, round, oval, etc.) and materials (liner, concrete, tile, etc.) up to 120m². It is equipped with 2 large-volume filter baskets that can be taken out from the top and maintained easily. OPSON WL is ultra light and simple in structure that is really a nice partner for pools.