Hayward Goldline T-Cell-3 TurboCell Salt Chlorination Cell for In-Ground Swimming Pools Turbo Cell or use with Goldline AQR - PRO, AQR 1.50 or greater , or AQR-X296 For use with Goldline AQRPRO operating with firmware version 1.10 or later, AQR firmware version 1.50 or greater , ProLogic P4 operating with firmware 4.10 or later, ProLogic PS operating with firmware 4.10 or later Right size your cell for the most effective chlorination possible .Reliable performance - delivered only by a genuine Hayward TurboCell Automatically generate a self renewing supply of fresh, pure chlorine - for water that's clean, clear, and luxuriously soft. The T-CELL-3 is designed for pools up to 15,000 gallons. It is compatible with the following models only and will NOT work with earlier versions. Huge savings - 50% or more over conventional chlorine AQR (AquaRite - all 2009 or later) - firmware version 1.5 or later AQR-PRO (AquaRite Pro) - operating with firmware 1.10 or later PL-P-4 (ProLogic P4) - operating with firmware 4.10 or later PL-PS-x (ProLogic PS) - operating with firmware 4.10 or later