How to set

Check the sticky threads at the top.

There are two designs for Westinghouse 28441. One with 5 buttons + reset, and other with 6 buttons + reset.
One timer has on and off buttons for override feature, while other has mode button for override.
Two timers, but apparently only one manual available 12-2012
This is a 24-hour plug-in-outlet lamp timer made in china, maximum load 600 watts, 5amp.

Copy following link to help identify timer and download possible manual
Woods-timers-and-manuals