Fitbit Charge 3 is Fitbit's most advanced health and fitness tracker ever. With the 4288357, get a deeper understanding of your body, your health and your progress. This water resistant advanced health and fitness tracker does more than count steps - it tracks 24/7 heart rate, calorie burn, 15-plus exercises, goal progress, sleep and more. Every day, you'll find valuable insights about your health that will empower you to take action, improve yourself and reach your goals. Fitbit Charge 3 is swimproof and water resistant to 50 metres so you can track swims, wear in the shower and more. Plus, its battery lasts up to 7 days for continuous access to insights and inspiration (battery life varies with use and other factors). Get call, text and smartphone app notifications on your wrist. Plus, send quick replies (Android only). This fitness tracker watch allows you to connect to your smartphone GPS for real-time pace and distance.