Features:

• Programmable 24-hour timer; mounts flush to wall, replacing standard switch
• 7 on/off settings per day; for 2-way and 3-way switches; 4 programming options; 7-day timer
• Durable plastic housing
• Includes timer and 2 backup battery
• 4.31 by 1.73 by 1.29 inches; 6-year warranty

Editor Reviews:

Product Description:
24 Hour, Flush Mount Programmable Timer, 7 On/Off Settings Per Day, For 2 Way & 3 Way Switching, Self Adjusting Option Follows Daily Sunrise & Sunset, Battery Backup, 500W Resistive, 120 Vac, 60 HZ.

Rating : - Extremely easy to program
I bought two of these units. Installation was easy and so was to program them.The only issue I have with this item is that the buttons are too small and you need the head of a pencil or a tiny srewdriver to push them. For one of them, I did have a problem tripping the circuit breaker, which I could not figure out.
Once programed, they have been working as desired for the last two weeks.

I strongly recommend this product.