Tracks steps, active minutes and sleep and shows stats on a bright, tap the display Reward kids for hitting goals with celebratory messages and achievement badges. Kids can challenge others to step competitions, plus send each other messages or cheers A showerproof tracker that survives splashes and spills with a secure, adjustable wristband for growing kids (one size). Designed for wrist sizes up to 155 mm/6.10 in. Syncs stats wirelessly and automatically to iOS & Android devices and has a battery life up to 5 days (varies with use and other factors)