Thank you for viewing. Brand new, unopened, and authentic. Will be shipped via Yu-Packet Post. Thank you. ※ Returns and exchanges are not accepted. ------ Efficiently assists with the two-handed swinging exercise (Swinging Shou) and contributes to health promotion. Because of its high far-infrared radiation efficiency, it can efficiently supply the energy generated by the two-handed swinging exercise to the human body. (From the instruction manual)