The Garmin Venu 4 is a smartwatch you can use to track and improve your health. With the Venu 4, you measure your stress, sleep, heart rate, and activities. You also gain insight into the results of your workouts. The battery lasts at least 10 days, so you don't have to charge your Garmin watch often. Have a smaller wrist? Choose the smaller 41mm version of the Venu 4.