lol, i am using the same timer as u b4
simple, the arrow knob, u juz spin it to the same time ur clock shows..
then from there, say u wanna set the time to ON from 11am to 11pm
u push all the pins down from 11 - 23
on pin is 15mins if i remember clearly..
a overwrite button on the side for u to overwrite the timer @ anytime..