Amazfit GTR Smartwatch is compatible with Android and iOS operating systems through Bluetooth. The watch offers 12 sport modes which include running, walking, cycling, swimming, climbing, skiing, and many more. It is durable, water-resistant, and lightweight. Its other applications are stopwatch, alarm clock, GPS, weather forecast, APP notifications, etc. Also, it accurately measures heart rate, sleep, stress, speed measurement, and distance. Typically its battery lasts up to 24 days or 74 days based on watch mode. Its weight is 0.11 pounds and the screen size is 1.4 inches. 

 Huami Amazfit GTR 47MM Smart Watch is packed with lots of smart features. Its 1.39 AMOLED Display, is readable in direct sunlight. It has an extremely strong battery life; it lasts Up to 24 Days on a single charge. Its 24 x 7 Continuous Heart Rate, is a very useful feature for a heart patient because if the heart starts to beat abnormally, this watch makes that person alert. And without removing this watch you can swim, because it's water-resistant. Its beautiful design and touchscreen feature make this watch look even more attractive. And last but not least, in this watch, there are more than 10 sport modes, which are very useful for all the athletes. Overall, this is one of the best smartwatches. And with this smartwatch buyers will get one year of manufacturer warranty as well.