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Fitbit Taking Preorders for Tracking Device With Sleep Monitoring Technology

Fitbit began taking preorders Monday for the Alta HR heart rate tracking device with new advances in sleep tracking, said the company in an announcement. Sleep tracking technology uses heart rate variability to estimate the amount of time users spend…

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in light, deep and REM (rapid eye movement) sleep, along with the time awake each night, it said. Fitbit’s sleep insights software analyzes data to provide personalized guidance on how to improve sleep, it said. Suggested retail price is $149, with April availability, said the company.