TNP 2 Pack Flex Charger Cable - USB Charge Wire Cord Power Adapter Supply Replacement Spare Charging Accessory for Flex Wireless Activity + Sleep Wristband Extra replacement spare charging cable for Fibit Flex. Keep your Fibit Flex charged up and ready to go Fast Charging Speed: Thick gauge wiring and reduced cable resistance enable our cable to provide the fast charge via any USB charger; Simply plug it into the USB port on your PC, Mac, laptop, notebook, portable power bank, wall outlet, car or travel charger for convenient and quick charging High-quality copper wire maximizes charge speed and increases durability; High-resistance insulation protects each set of wires; Outer jacket made of solid PVC helps to protect the cables from damage and fraying Voltage Regulator (PTC) Inside: Prevent your Flex from being damaged by over-current when connected to USB power source Note: Specially designed for Flex, not compatible with other products