Pentair 520555 IntelliChlor IC40 Salt Chlorine Generator Cell (US Version) Easy-to-view displays enable fast checking of salt levels, cell cleanliness, sanitizer output and water flow Adjustment is as easy as pressing two buttons All performance dataproduction settings, hours of operation, chlorine output, cell cleaning cycles, salt Cell use tracking feature communicates remaining hours of cell life in real-time Requires 520556 Intellichlor Power Center (sold seperately) Automatic shut-off feature protects the unit and prolongs cell life under low water temperature conditions Fits Pentair Compool to EasyTouch Upgrade automation On-time cycling prevents calcium and scale build-up to maximize cell life Ability to communicate with IntelliTouch, EasyTouch, and SunTouch automation systems Certified to UL 1081 standard for safety; NSF approved; Measures 7-inch length by 7-inch height by 17-inch width