Terahertz Facial Roller [Double Roller] This is an easy-to-use manual facial roller. Just roll it on your face while watching TV, during your free time! It comes with large and small rollers, making it easy to use. Instant purchase OK. ★ Terahertz Stone Terahertz stone is a mineral that contains "terahertz waves," which are in the intermediate region between light and radio waves. It is an artificial stone that is said to emit terahertz waves, which vibrate 1 trillion times per second. It is made by refining silica stones such as quartz, quartzite, and quartz schist at high temperatures. Terahertz waves have intermediate properties between radio waves and light, with the permeability of radio waves and the straightness of light. Terahertz waves are said to have various health benefits, working on weakened cells, enzymes, and DNA in humans, restoring them to their original normal state, and improving immunity and natural healing power. #TerahertzStone #BeautyGoods #FaceCare #FacialDevice #BeautyRoller #FacialMassage #TerahertzFacialDevice