Water Tech Blue Pearl is an advanced robotic cleaner that is able to effectively clean your pool in about 2 to 3 hours without your having to lift a finger. Using air and optical sensors, it can map the most effective way to clean your pool, while its patented PVA brushes to ensure optimal traction on any pool surface, yet will last twice as long as competitors bristle brushes. Simply plug in the Blue Pearl and drop it into your pool for drastically reduced pool maintenance.