The 5600SXT offers a low voltage electronic metered "on-demand" control that provides easy, user-friendly programming.A large back lit LCD display alternates between time of day and soft water remaining. Advanced programming includes up to 6 independently adjustable cycle times. 48 hour internal power backup capacitor keeps time during power outages.Programming is stored in memory and will not be lost due to power outages.Less moving parts than the standard electro-mechanical version.Service and self diagnostic modes easily accessible to view water usage data.Be aware of off shore made knocks offs (ask!).Outdoor rated.