Stay on top of your fitness goals with the Fitbit Charge 4. This sleek black wearable offers advanced tracking features and built-in GPS. The main features of the Fitbit Charge 4 are: Built-in GPS: Allows you to track your pace and distance during outdoor runs, rides, and hikes without needing your phone. Active Zone Minutes: Tracks your time spent in fat burn, cardio, and peak heart-rate zones to help you meet your weekly activity goals. Heart Rate Tracking: Monitors your heart rate all day and night, including your resting heart rate, to help you track trends over time. Sleep Tracking: Provides a sleep score based on your heart rate, time asleep, and restlessness to help you better understand your sleep quality. SpO2 Monitoring: Measures the oxygen saturation in your blood to help you understand your health trends. Swimproof Design: The tracker is water-resistant, making it suitable for swimming and showering. Fitbit Pay: Allows you to make secure payments from your wrist. Spotify Controls: Enables you to control your music from your wrist.