Fitness tracker, KuGi Bluetooth Fitness Tracker Watch, H30 IPX7 waterproof OLED screen Fitness Tracker smartwatch + Heart Rate Monitor Pedometer Smart Wristband Band for Android and iOS, kids (Orange) Compatiable Operating system: Bluetooth 4.0, IOS 7 version above or Androld 4.4 version above smart phone Functional and Stylish: Walking Distance Tracking, Steps Counting, Calories Burned Measuring, and Sleep Management etc. Monitor your activity levels and achieve the daily exercise targets you set .Greate Healthy Habits with the Healthy Habits System - makes Habit formation fun! Simple and fashion: Anytime record the number of steps you walk, move distance and calorie consumption, so you real-time monitoring their movement index, based on your height, weight and other parameters accurately calculate calories burned Information: 0.66 inch OLED display; TPU Wristband material :G-sensor Acceleration; Polymer Lithium 80mAH Battery; 20-25 days standby time; 28.6g net weight. Sleep Monitoring: monitor your sleep time and quality;Track Sleep including total hours,time to fall asleep, number of wake ups.