7 days of battery and Water-resistant up to 50m Compatible with iOS 15 or higher & Android OS 9.0 or higher Move more: Heart Rate on Equipment via Bluetooth, Built-in GPS, 40+ Exercise Modes, Daily Readiness Score, Active Zone Minutes, 24/7 Heart Rate, All-day Activity Tracking, Cardio Fitness Level, Automatic Exercise Tracking, Workout Intensity Map and Reminders to Move Comfortably Connected Day and Night: Google Maps, Google Wallet, Youtube Music Controls, Call, Text and Smartphone App Notifications, Vibrant Colour Touchscreen with Customizable Clock Faces, Timer and Stopwatch Sleep better: Automatic Sleep Tracking, Personalized Sleep Profile, Daily Detailed Sleep Score, Smart Wake Vibrating Alarm, Sleep Mode Meet Google Health Coach. With Fitbit Charge 6, get three months of personalised coaching that adapts to you - all powered by effortless, accurate and continuous tracking.