The Fitbit Ace Power Purple Kids Activity tracker makes fitness fun for kids by rewarding steps with goal celebrations and virtual badges. By inspiring your child to meet their daily goals, tracking sleep and activity patterns by single-tapping the screen, exercise will no longer be a chore; Practical as well as smart, the Fitbit Ace has a showerproof design and a one size; adjustable band to fit wrists 5.0 ; 6.34; in circumference. With two views, you can check in under the family account to view your childs activity. Made for ages 8+, the Fitbit Ace features 10 clock face designs and an OLED tap display that can be oriented horizontally or vertically (see PDF manual attached). This product includes one activity tracer and one charging cable. The Ace has a battery life of up to 5 days thanks to energy saving features like the auto-dimming screen, which can be reactivated by turning the wrist or double-tapping the screens edge. See manual for charging instructions. Display information LED screen. Battery Typical usage time of up to 5 days. 2 hour charge. Features Pedometer. Distance. Sleep.