Does graphene bracelet belong to a class of medical devices?

Don't belong. By querying the medical device classification catalogue, we know that graphene bracelet is not a kind of medical device, and its main purpose is to improve human body link and energy regulation, which is helpful to enhance the function of human immune system, reduce fatigue and regulate emotional state. Medical devices refer to instruments, equipment, appliances, in-vitro diagnostic reagents and calibrations, materials and other similar or related items directly or indirectly used in human body, including required computer software.