Powerful Cleaning Performance Experience top-tier pool maintenance with the Hydro 4 Robotic Pool Cleaner. Outfitted with a unique two-pump design, the Hydro 4 delivers superior suction power for efficient wall-climbing and meticulous waterline cleaning. Superior Waterline Cleaning The Hydro 4 stands out with its advanced lateral movement for waterline cleaning. The Hydro 4 s innovative design allows it to move sideways along the waterline, providing a more thorough and efficient clean. Smart APP Control and Cloud Function Take control of your pool cleaning with the Hydro 4 s intuitive app control and cloud function. Schedule cleanings, manual control and customize cleaning modes all from your smartphone.