Weekly Program Function: Set Up To 17 On/Off Settings For Precise Control Over A Week, With Timing Options From 1 Minute To 168 Hours, Promoting Unattended Management. Energy Efficient: Customize Schedules For Water Pumps, Fish Pond Oxygenation And More, Promoting Energy Savings And Optimal Performance. Stable Performance: Rely On Consistent Operation, Ideal For Both Residential And Commercial Applications. Intuitive Design: User-Friendly Interface For Seamless Programming And Customization, Suitable For A Variety Of Uses. Built-In Rechargeable Battery: Ensures Memory Retention For Over 180 Days, Eliminating The Hassle Of Reprogramming After Power Outages. Designed for reliability, our Smart Timer Switch is the epitome of efficiency and functionality. With its intuitive design, it's easy to operate, ensuring you get the most out of your water pump and fish pond oxygenation systems without constant oversight.