Intermatic ET1715C 7-Day 20/30-Amps SPDT Electronic Time Switch, Clock Voltage 120-Volt - 277-Volt NEMA 1 Permits different operation each day 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 set points or events (14 ON/14 OFF per channel) can be distributed throughout the days of the week Automatic Daylight Saving Time adjustment (Factory Enabled)