You can use the Samsung Galaxy Fit2 activity-tracking band anywhere from 15 to 21 days on a single charge. This long battery life makes the gadget great for fitness enthusiasts, saving you the hassle of constantly charging. It boasts plenty of features, but its highlight is the accurate heart rate sensor. You can wear the Samsung Galaxy Fit2 at the gym to track your heart rate and monitor how much you’re pushing yourself. It also comes with a 1.1-inch AMOLED screen for clarity and color accentuation. Equipped with a 3D curved-glass display, it ensures you can easily see your texts with minimal effort while you’re in motion. Plus, the screen is narrow to fit petitely on your wrist. Available in black or scarlet, this tracker lets you choose a shade that best suits your style.