1Fine Craftsmanship: With attention to detail, this Terahertz gua sha tool has a smoothly surface and nicely rounded edges to prevent skin damage or scratches. Conforming to ergonomic design, it is easy to grip and use. 2Lymphatic Drainage: Terahertz stone contains many essential trace elements for human body that can boost physical health. It accelerates skin regrowth and detox, improves skin elasticity, and aids in lymph system detox. 3Hot and Cold Compress: Terahertz stone, a potent healing stone, exhibits high vibrational frequency and thermal conductivity. It increases blood flow and circulation and promotes metabolism. Suitable for both hot compress (to relax muscles and open pores) and cold compress (to tighten muscles). 4Tighten Skin: Massaging with this facial gua sha tool can enhance skin tightness, prevent the appearance of fine lines or wrinkles, promote the absorption of skin care products, and reduce swelling, eye bags, and dark circles. 5Meridian Clearing: Improves microcirculation, clears meridians, regulates the digestive system, and balances cellular equilibrium. Energy stone helps boost overall health and well being.