3 Timer Modes:
7-Day time mode- On/Off all week or any day of the week at the exact set time.
Digital Photocell- On at dusk and Off at the exact time you choose
Countdown Photocell- On at dusk and Off at either dawn, 1-12 hours later or the exact set time
8 ON/OFF programs per week
Built-in rechargeable battery maintains programming during power losses or when unplugged.