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 With multi-sport functionality, Surge lets you track every aspect of your training. Designed with advanced smartwatch features, Surge lets you run your day, your way 1 year Manufacturer Warranty from the date of purchase