Credit: AmazonIf you’re looking for a solar-powered smartwatch, this Garmin Solar Edition Marine GPS Smartwatch is now 50% off, making it $549, down from $1,099.99—an all-time low price, according to price trackers. When fully charged, it has 37 days of battery life and connects to other compatible Garmin marine devices. When you pair the Garmin Solar Edition Marine GPS Smartwatch with your smartphone, you can access pre-loaded activities like a variety of water and land sports, as well as training features. It also monitors your health through the wrist-based heart rate by tracking your sleep cycles and stress. Although not entirely waterproof, it has a water rating of 10 ATM, meaning it can withstand pressure up to 100 meters deep.