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The One wireless activity and sleep track is an easy clip-on wearables meant to be worn all day on your belt, pocket, or bra. Throughout the day, One tracks your activity through metrics such as steps taken, distance, steps climbed, and calories burned. When you're ready to hit the hay, simply wear the One in its comfortable wristband, and it tracks your sleep quality and its vibration alarm gently wakes you up in the morning. All your metrics are visible in the Fitbit dashboard in the accompanying app. Its sleek display gives you insight into your progress towards your goal throughout the day.