ET1700 Series 7-day electronic time switch features independent 7-day programming to provide flexibility for applications where load switching differs each day of the week. These time switches provide dependable and uncomplicated performance, plus to-the-minute programming for accurate load control and reduced energy costs. Program can be repeated on a weekly basis. Multi-volt operation from 120-277 VAC, 50/60 Hz. To-the-minute programming for accurate load control and reduced energy costs. Up to 28 setpoints. Automatic Daylight Saving Time (DST) ON/OFF adjustment (factory enabled). Non-volatile EEPROM memory protects programming indefinitely. Temporary override or permanent manual override available via control buttons.