About the Intermatic ET90215C digital timer 365 day Astronomic, 2 circuit SPDT the Intermatic ET90215C digital timer 365 day Astronomic, 2 circuit SPDT provides 365 day astronomical energy control that allows for independent programming for every day of the year, providing flexibility for applications where load switching differs frequently. This great time switch offers uncomplicated and dependable performance, as well as to the minute programming to accurately control the load and lower energy costs. The Intermatic ET90215C digital timer 365 day Astronomic, 2 circuit SPDT also offers holiday and exception programming to provide temporary overrides of your repeating schedules. The Intermatic ET90215C digital timer features control buttons that provide manual control of each circuit independently, regardless of the operating mode. This amazing time switch includes a 100 hour super capacitor that provides time keeping as well as automatic carryover without a battery. You can also use external devices, such as wall switches and occupancy sensors to provide manual on and timed off capability. The programming of this Intermatic sprinkler timer has also been simplified by a USB port for easy copying and backups.