"JETLOG's patented and award winning technology properly times Power Naps
according to efficient sleep stages for beneficial fatigue recovery.
Properly timing naps to prevent deep sleep and dreaming not only
relieves negative post nap effects such as grogginess, disorientation,
or headaches, but also avoids subsequent sleep loss, which would
otherwise compromise regular sleep.

JETLOG utilizes a touch-sensor located on the 24x7 PowerNapping
Springboard module specifically designed to monitor a person's
transitions into critical sleep stages. It initiates wake-up calls
whenever the person who touches the sensor starts diving into deep sleep
or dreaming by detecting a significant drop of correlated muscle
tension."