Cleans pool floor, cove, walls and waterline Recommended for in-ground residential pools up to 50 ft. in length. The Dolphin Supreme M400 raises the bar for robotic pool cleaners, representing the latest generation of dolphin technology. Dolphin Exclusive Features: Weekly timer — preset cleaning cycles throughout the week! Full filter indicator lets you know it’s time to clean the cartridge Additional 3rd underside scrubbing brush powers away dirt and debris! Quick-n-easy top access to filter cartridge Patented swivel cable helps prevent tangling Incredibly efficient – costs less than 15 cents to clean the pool. More: Scrubs, vacuums and filters all pool surfaces in just 2.5 hours. Large inner filter cartridge, collects dirt, debris and even dust particles. Plug-n-play! No pre-installation needed, no connections to pool system. Self-programmed for optimal pool scanning. Caddy is not included.