20 Exercise Modes Set your personal goals & pick from 20 exercise modes for real-time stats Sleep Tracking & Score Track your sleep quality & stages to get a better understanding. Silent Alarms and; Smart Awake Be woken at your optimal sleep stage with quiet vibrations on your wrist. Smart Notifications Keep in the loop with calls texts & smartphone notifications from your phone. Key features. Up to 7 days of battery life. Built in GPS. Up to 50 meters water resistance. 24/7 Heart Rate Monitoring. Blood Oxygen Monitoring. Compatible with i OS and; Android . Track your wellness. Track important changes in your wellness with health metrics like your blood oxygen level heart rate variability breathing rate & more. Dive in. The Fitbit Charge 5 is water-resistant to 50 meters. This device can be worn in the pool or shower however please don't take it into the sauna or soak it in the bath with it on. . . Focus on your heart health. Keep an eye on your heart with the EGC app that assesses your heart for irregular rhythm. Get heart rate notifications that let you know when you go above or below your threshold Vibrant Display. The display is two times brighter than the Charge 4 & you can use the always-on display mode to check your progress at a glance.