– For children 6+. Pleasant and safe. Fitbit Ace 3 is made for lively action with a comfortable silicone strap and a secure, adjustable buckle. Battery life 8 days. Sleep monitoring. Family challenges. Timer and stopwatch. Different clock faces. All-day operation of activities. Waterproof up to 50m. Movement reminders. Sleep reminders and alarms. Call notifications (on smartphone). Bracelets and accessories. Through PARENT VIEW, parents can easily see their children’s activity and approve their connections.