1Color Changing Necklace: Thermochromic gemstones are calibrated to a pleasing blue or green color at the normal resting peripheral temperature of the average person. Different colors represent different states, so the color of the necklace can reflect the state of your body at the moment. 2Stylish Design: Unisex, no one would doubt that the necklace is effective. It can better showcase your personality and style. 3Performance: Lymphatic hyperthermia chain can not only help to lose weight, but also accelerate basal metabolic rate, increase energy level, effectively promote better sleep, reduce stress, improve blood circulation, and normalize blood pressure. 4Lymphatic Drainage: Negative ions increase the permeability of cell membranes, which is conducive to the absorption of tissue fluids in lymphatic vessels. Therefore, it prevents blockage of the lymphatic system.