zeo sleep monitor is part of a trend toward using technology to monitor our own bodies. It is an alarm clock that records electrical signals from your brain with a headband. In the morning it returns a chart of how much time you spent in light, deep and REM sleep, as well as a personal sleep score (which they call your ZQ). It can also make waking up easier to wake you if you ask it to, by choosing a lighter sleep moment to rouse you.