Amazon brings Fitbit Surge Ultimate Fitness Super Watch Large Black at Rs.19990. Maximize training, maintain intensity and monitor calorie burn with automatic wrist-based heart rate monitoring, Make the most of your day by getting more out of your night. Surge automatically monitors how long and how well you sleep, Built with eight-sensor technology and best-in-class battery life, Surge transitions seamlessly from workouts to tracking real-time stats. 1 year Warranty.