Best Inventions 2005: Live Wires

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NICHOLAS EVELEIGH FOR TIME

Rise and Shine
Inventor: Lee Loree
Availability: Now, $149
To Learn More: sleeptracker.com
Ever wonder why you feel groggier some mornings than others? It may be because your alarm went off when you were in the middle of a deep sleep. The Sleeptracker watch solves this problem by waking you only when you are in a light sleep. Equipped with a built-in motion sensor, the watch can tell whether you are in a deep or a light slumber. (The more restless you are, the lighter your sleep.) To ensure an optimal waking time, allow a window of 20 minutes or so when it would be O.K. to get up. Then Sleeptracker's alarm will go off when it senses that you are best ready to face the day.
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