The Volas Electric Heating Ankle Protector with Vibration Massage and Graphene Technology listing says advanced graphene-based heat therapy, gentle vibration for relaxing massage, customisable temperature settings, targeted comfort for multiple body areas and a lightweight design. It is in Best sellers.
Therapy and relaxing massage are listing copy, not a medical result. The first photo is a dark grey wrap with a black panel that reads 38.
See the Volas ankle wrap page.