Lintelek Fitness Tracker for Kids Girls Boys Teenagers, Activity Tracker with Heart Rate Monitor, IP67 Waterproof Step… Price: $13,89 (as of 17/05/2021 12:11 PST- Details)

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Auto Heart Rate and Sleep Monitoring: Lintelek fitness tracker can continuously measure your heart rate and monitor your sleep to tell you how long and how well you sleep during the night.
Activity Tracking All Day: This fitness tracker has 14 kinds of sports modes that can be switched,accurate tracks your steps,distance,calories,active minutes all day, keeping you on the right path to reach your goals.