The X-Watch 4 is a multifunctional smartwatch, sport computer, and fitness tracker. It is an Android Wear smartwatch, powered with multi-sport functionality. It can track your steps, distance, and calories burned. The X-Watch 4 also has a built-in pedometer that tracks your steps, distance, and calories burned. It also has a built-in sleep monitor that tracks your quality of sleep. The X-Watch 4 has a built-in heart rate sensor that tracks your heart rate. It also has a built-in motion sensor that detects movement. The X-Watch 4 has multi-sport functionality. It lets you choose from a series of activity types such as running, biking, walking, hiking, trail run, etc.