Hi there, go on your PC or laptop and go to lucidology.com. Type in your name and your email and then click on "take me to the tricks" you will then come to a page with 4 different things on it, just click on lucid timer, now you will come to a full page with the timer on. You can either choose the 4 different timer options on the page or in the boxes for the timer on the left of the page you can delete the mins and type in your own. It's so, so easy you really can't go wrong. It's the easiest one out there. Now just plug your earphones in and lie down and go to sleep and the timer will wake you. Choose it to ring 27 times each time it goes off and have your volume so that it's loud enough to wake you. It's very good, I use it all the time. Let me know if you get stuck and I'll help you