1Lymphatic Drainage: Terahertz contains a variety of trace elements needed by the human body, which can strengthen the body and prevent various diseases. It accelerates skin regeneration, helping people to stay healthy and beautiful. 2Hot and Cold Compresses: Terahertz stone is a powerful healing stone with high vibrational frequency and thermal conductivity. It stimulates metabolism. Has the ability to absorb temperature quickly and is suitable for both hot compresses(relaxes muscles and opens pores) and cold compresses(contracts muscles). 3Versatile Use: The roller stick can be easily and comfortably applied to your face, neck, body, arms, nose and even around your eyes to help your skin absorb more skincare products and improve your skin. 4Firming Skin: The terahertz facial beauty roller visibly improves and firms body skin, firming loose skin all over the body, improving skin elasticity and making skin firmer, smoother and healthier. 5Fine Craftwork: Attention to detail, surface smoothness, rounded corners, will not scratch or damage the skin, you can rest assured that you can use, ergonomic design, easy to grip and use, simple and easy to operate.