Come and see our amazing products. This production is made of metal and nanomaterials.It is a kind of natural current that is like the human body.It is sent to deep muscle tissue,which can stimulate muscle contraction an increase muscle tension,effectively reduce lactic acid accumulation and prevent muscle soreness.Custom logo is avialble,contact us for details. Pls confirm with us about the packing info, stock color and exact production time before placing your order.