... the screw structure could do massage on skin; & Working theory: Infrared physical therapylight energy: 020W (adjustable). Infrared spectrum with 940nm could ... Extrusion. Especially the screw structure could do massage on skin; Radio frequency energy, infrared energy, suction pressure, suction time and ... : 0~7.5s RF interval: 0.5s Wave length of infrared ray: 940nm Power: 0W, 4W, 6W, 8W, 10W, 12W, 14W ...