Who Needs Leg Compression Massager for Circulation?Are You Also Troubled by These Leg Problems?Unique Vibration Modes DesignThere are 3 levels of vibration function for you to choose. The blue light is breathing vibration, from weak to strong and then to weak; the green light is continuous vibration; the yellow light is intermittent vibration. The vibration area is the calf, which can relieve leg numbness and stiffness, and promote blood circulation.Warm Tips:1. If you are pregnant, or have a heart problem or suffer from major diseases, please consult your doctor first before using the unit.2. Leg massager for circulation adopts air compression on your legs and feet, heats the knees and soles, and vibrates the calves to relieve fatigue.