Introducing the Whoop Superknit Band in Black (model 4.0), an accessory that is perfect for both iOS and Android users. This unisex adult band is designed to measure heart rate, calories, and distance, making it an essential tool for running and jogging. The band comes with a Bluetooth feature, an alarm, and a calorie monitor, all of which can be accessed through the mobile app. With a manufacturer warranty of 6 months, this band is a reliable fitness technology product that provides accurate measurements. Get your hands on this black Whoop Superknit Band with a clasp today and start tracking your fitness journey!