The Garmin vivosmart 4 (Renewed) is an activity tracker that learns your activity level and assigns a personalized daily goal. It features a slim and stylish design that blends fashion with style with metal accents and a bright, easy-to-read display. Track activity, monitor your heart rate, get smart notifications, and even access detailed fitness monitoring tools such as VO2 max estimate and your fitness age. This helps gauge blood oxygen levels with its wrist-based Pulse Ox feature. It follows your progress 24/7, and it can stay on for 7 days without a battery charge. Each time you receive a text, email or call from your compatible Bluetooth device, vívosmart 4 gently vibrates and automatically displays the information.