The Fitbit Flex Activity Tracker Replacement USB Charging Charger Cable is a lightweight and easy-to-carry cable made from polypropylene and copper. It is designed specifically for the Fitbit Flex model, with a USB connection for efficient charging. The cable is 20 cm in length and features circuit protection with IC, ensuring a safe and reliable charging experience. Perfect for keeping your activity tracker powered and ready for use, this charger is a convenient accessory for fitness enthusiasts on the go.