The GNC Bluetooth Pedometer is the easiest way to track health and fitness goals within a small pedometer. GNC's goal is to help you live well and enjoy life. The GNC Bluetooth Pedometer accurately records steps, calories burned, distance, sleep quality, and heart rate monitoring with optional accessory. The LED display has easy to read graphs that display your fitness information. History calendar shows activity levels and achievements over time. Compatible with both Android and iOS smartphones.