The Fitbit Alta HR is a wrist-worn activity tracker designed for both indoor and outdoor use. It provides heart rate monitoring and has a sleek red color with a durable plastic material. This unit is compatible with Android operating systems and features Bluetooth connectivity for easy syncing. The Alta HR is equipped with an accelerometer sensor and is perfect for tracking running and jogging activities. It comes with a 1-year manufacturer warranty, making it a reliable choice for fitness enthusiasts looking to monitor their performance and health.