Smart Watch Fitness Watch Fitness Tracker sells on Amazon. I think the price is very good. Please read some of the reviews and see people thought of the product.**If you’re not sure whether to buy, add to cart, and you can come back to it later!**

1. Heart rate and sleep monitoring: Built-in latest version of Nordic 52840 chip, smallest size, lowest power consumption, highest integration. The data is completely accurate and the battery life is longer! Automatically and continuously track real-time heart rate, and through a comprehensive analysis of sleep quality data, automatically track your sleep time and consistency, helping you adjust your lifestyle and make it healthier.

2. The smart watch has professional running functions, such as duration, heart rate, steps, calories, speed, pace, mileage.