The Blue Pearl is the world's most affordable robotic cleaner, with the ability to clean an entire pool in 3 hours. The Blue Pearl is the best climbing, cleaning and brushing robotic cleaner ever made. We install our patented PVA brushes on every machine. Originally designed to climb the slick tile walls of European pools, PVA brushes offer up 100% greater traction, virtually clinging to the wall providing unequaled gripping ability. It's almost like having a scrubbing sponge for the pool. This special material lasts twice as long as conventional faux bristle rubber brushes found on all other brands, and resists oil, bacteria, algae and other contaminants. Water Tech Corp's Ultimate Robotics save time and wear and tear on both the pool and machines themselves. Their Super Smart Cleaning patterns have made obsolete the archaic, ineffective zigzag and grid cleaning patterns other robotic cleaners still follow. They feature a one-and-done, almost surgically precise cleaning swath.