With the Polar M600, you get the practical benefits of Android Wear combined with Polar's powerful sports features. Optimize your everyday life anywhere - in the office, at the pool, or when you achieve your personal bests. The Polar M600 features a specially developed and optimized technology for wrist-based heart rate monitoring. Training with the Polar M600 is comfortable and straightforward. Just pull the strap tight, and you're ready to train. Track your speed, route, and distance with the built-in GPS. The waterproof Polar M600 can be worn on any occasion. Monitor your activity around the clock, including your steps, distance, calories burned, as well as the duration and quality of your sleep. The Polar M600 has a 2-day battery life when connected to Android devices.