1Fine Craftsmanship: The Terahertz stone gua sha tool boasts attention to detail, with a smooth surface and rounded edges that won't scratch your skin, ergonomically designed easy to grip and use. 2Heat and Cold Therapies: High vibration frequency and thermal conductivity, quick temperature absorbing ideal for hot compresses to relax muscles, as well as cold compresses to contract muscles. 3Revitalizes Skin: The tool helps improve skin firmness, inhibit the appearance of fine lines and wrinkles, promote the absorption of skincare products, and reduce puffiness, as well as bags and circles under the eyes. 4Discomfort Relief: Terahertz Gua Sha tool is effective in relieving tension and irritability, easing your everyday muscle discomfort, headaches, and cervical spondylosis, contributing to your overall physical and mental health. 5Lymphatic Drainage: Rich in trace elements, accelerates skin regeneration, improves skin elasticity, aids lymphatic system, relieve scalp fatigue, improved hair and scalp health, and better sleep.