Accent your style while enhancing your fitness with the Garmin vívosmart® 4 activity tracker. This slim, smart wristband is loaded with features to track your daily activity and your sleep stages all night. It monitors heart rate at the wrist and includes helpful tools such as all-day stress tracking, a relaxation breathing timer, VO2 max and activity timers for walks, runs, strength training, pool swims and more. A wrist-based Pulse Ox sensor lets you check blood oxygen saturation anytime during the day — or turn it on while you sleep. Plus, Body Battery™ energy monitoring helps you know when you’re ready to go be active or when you may need to rest. Safe for the pool or shower, vívosmart 4 keeps you going strong with up to 7 days of battery life — while smart notifications with vibration alerts help you stay connected on the go.