Take control of your fitness journey with Fitbit Charge 4 Watch. This advance fitness tracker offer: GPS tracking: monitor your runs,hikes and bike rides with precision. Heart rate monitoring: continously track your geart rate and rhythm. Up to 7 days of battery life: enjoy extended use without needing a recharge. Water rsistance: withstand swimming and water activities with 50M rating. Guided breathingsession: relax and unwind with personalized sessions. Notifications: receive alerts for calls, texts and emails on your wrist.