Yakamoz Colorful Replacement Magnetic Silicone Clip Clasp Holder for Fitbit Flex Wristband Bracelet Fitness Tracker with Free Fastener Ring (Black) Specifically designed for fitbit flex fitness tracker The magnetic clip makes you easy to carry your fitbit flex tracker around and prevent your fitbit flex tracker monitor from missing. More convenient for working, sporting, hiking, walking people. Made of quality silicone will provide you a comfortable wearing experience. Accessory only, the fitbit tracker is not included.