AutoPilot DN2 Pool Pilot® Digital Nano 220V with PPC1 Manifold has everything you need for a simple install and is just as simple to use. Digital Nano features include microprocessor controls with a digital read-out of pool water temperature, current salt level, purifier production level and more. It also tells you how much salt to add should it run low. The Nano 220V will maintain pools up to 28,000 gallons with the PPC1 patented manifold.