By Dave Sebastian
Amazon.com Inc. rolled out Amazon Halo Band, a wristband that tracks health and wellness, challenging products by Apple Inc. and Fitbit Inc.
The wristband tracks body-fat percentage and monitors its users' activity and sleep, Amazon said Thursday. The product is available for early order in the U.S. starting Thursday.
Amazon said the product's battery lasts up to seven days and fully charges in under 90 minutes.
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