It's so easy you won't believe.
During the day, you wrist will vibrate randomly (you decide how many times). All you need to do when it vibrates is to perform a quick reality check (for example, try pushing your right index and middle fingers against your left palm and see if they go through). They don't? OK. Means you're not in a dream.
Then, during the night, the device will vibrate again while you are dreaming (using our REM detection technology).
As soon as it does, you will feel your wrist vibrate inside your dream and do the same thing that you do during the day, you know... the fingers thing. But this time, the fingers will go through your palm. Funny! Right?
YES. That's it. You now know you're in a dream and can do whatever you want. As simple as that!