Fitbit Flex 2 Silver Accessory Bangle Bracelet Fitbit Flex 2 Silver Accessory Bangle Bracelet. Elevate your tracker's look with this sleek, stainless steel bangle. This official Fitbit accessory features a secure hinged closure and a grooved housing to hold your Flex 2 tracker (tracker not included). The mirror-finish silver tone makes it perfect for work, weddings, or everyday style. Good used condition with some minor surface scratches consistent with normal wear. Versatile and lightweight design.