Polar A370 is an attractive, sporty, waterproof fitness tracker that helps you keep your pulse racing around the clock with continuous heart rate monitoring, advanced sleep tracking, and Polar's unique training features. Learn how your heart reacts to the ups and downs of your everyday life. The Polar A370 wrist pulse monitor tracks your pulse continuously, providing a complete overview of your daily activity. Polar A370 shows you how many calories you burned, how high and low your heart rate was, and how your heart rate varies throughout the day. Sleep Plus gives you valuable insights into your sleep. Time, duration, and quality of your sleep are tracked, and sleep interruptions are automatically detected. You can set your preferred sleep duration and rate your sleep, receiving feedback on your sleep patterns and considering what you can do to make the most of the night. When you train outdoors, the Polar A370 uses your phone's GPS signal to measure speed and distance and track your route. Polar A370 smart notifications keep you up to date even when you don't have time to check your smartphone. You'll receive notifications on the display of your Polar A370 for calls, messages, social network updates, or calendar appointments. Training is easy and enjoyable thanks to pulse measurement on the wrist. The heart rate zones help you train with the right intensity. Polar's unique scientifically proven Smart Coaching features guide you through your training sessions and provide motivating feedback.