Read our Dolphin Sigma Review — A highly-efficient automatic pool cleaner for 2019. What makes this robotic pool cleaner so advanced? What makes it special? It’s categorized as a Maytronics Deluxe Class cleaner making it a step above the average pool robot. Designed for inground pools up to 50-feet. It has many excellent features, such as : CleverClean advanced navigation, Dynamic Dual-Drive motor for 360° maneuverability, Dual-Level Filtration, control the Sigma with your smartphone and much more. We get into all the details and help you determine if this is the right pool cleaner for you.