1、Good Thermal Conductivity Specific Heat Characteristics: Temperature can be raised and lowered immediately with a small amount of energy, and effect of cold compress and hot compress can be easily experienced by placing it in cold or hot water for 5 seconds. 2、Improve Mood: Enhance healthy cardiopulmonary function, relieve tension and irritability. 3、Rich In Trace Elements: Terahertz contains a variety of trace elements required by human body, which can enhance physical fitness. 4、Smooth Touch: Guasha massage board made of high quality material, will not harm your skin, easy to use, enjoy SPA at home or travel. 5、Relieve Pain: Relieve your daily muscle soreness, headache, cervical spondylosis, good for physical and mental health. Item Type: Gua Sha Facial Tool Size: Approx. 96.5 x 56 x 9.8mm/3.80 x 2.2 x 0.39in function of energy stone is to achieve purpose of odor absorption, temperature adjustment, humidity adjustment, electromagnetic shielding, energy saving and health benefits through self purification, self repair, self release, self adjustment, and self adapting high tech materials. The energy stone contains more than 30 kinds of trace elements beneficial to the human body, such as selenium, zinc, and calcium. The initial wave released by these elements is in the same wave state as the initial wave of human cells, which can generate resonance, make human cells and tissues more active, promote blood circulation, promote metabolism, and eliminate waste in the body. Function: 1. Reduce facial tension 2. Enhance skin elasticity, firm and tightening skin 3. Inhibit appearance of fine lines and wrinkles 4. Reduce puffiness, eye bags and dark circles 5. Helps penetrate beauty products, such as creams and serum, and absorb more deeply into skin 6. Promote blood circulation to face, natural and healthy luster 1 x Gua Sha Facial Tool