Hi Verre - thanks for you comment and congrats on your wings! I had a look at the dreams that got you them - pretty epic! To answer your question - I use a small vibrating alarm called the 'Invisible Clock II' - its very small and light and customisable. Its quite a cool experience to have a signal you've programmed in real life be incorporated directly into the dream and get you lucid - a direct EILD - as close as you can get I guess to sending a message 'to the other side' - but most of the LD's I've gotten through this tech have been DILD's and the clock is essentially just a way of quietly interrupting my sleep on a very regular basis.

Dahaka - regarding the audio - it lasts around 8-10 secs in length, so not long. I guess you could think of it as an autosuggestion, focusing your intention as you fall back into sleep (as well as raising your alertness and acting as a reality check to pick up FA's).

Hope this helps -thanks for the questions - cheers - T