FLEXIBLE SCHEDULING- Up to 20 ON/OFF settings, programmed differently for different days of the week, ON/OFF AUTO ON/OFF DST modes,totally 5 modes to meet your daily schedule EASY TO PROGRAM-The timer is straightforward to program,Daylight saving time mode could be activated by press the clock button for 3 seconds BATTERY BACKUP- Rechargeable built-in battery backup retains the programming even in a power outage and protect you from the trouble of reprogramming ENERGY SAVING- Automatically turn on/off lamp, coffeemaker Christmas lights, humidifiers, aquarium, fish tank and other appliances as your scheduled to save money from excessive use of electricity in the house as well as streamline your daily routines QUIET & RELIABLE- No ticking or humming noises like a mechanical timer, ideal for indoor occasion; one year warranty provided