All 3 power up and sync to fitbit, 3 chargers

The Fitbit Flex Wireless Activity Tracker is a fitness technology device that tracks your activities in English language. It features wireless capabilities, Bluetooth connectivity, alarm function, wristband for easy wearing, data review, calorie monitoring, and sleep tracking. Ideal for gym training, yoga, and running, this activity tracker by Fitbit is a convenient and efficient way to monitor your daily fitness goals and improve your overall health and wellness.