STIMULATE AND EXERCISE YOUR FACIAL MUSCLES SŌLEIL utilizes a gentle microcurrent and traditional Gua Sha techniques to massage, sculpt and stimulate the facial muscles for a more radiant and youthful appearance. Reaches deep into the muscles and surrounding tissue to elevate and tone your face and neck areas. The orbed massage bead boosts absorption of eye cream and encourages circulation to help reduce dark circles and puffiness. Its integrated solar panel draws in renewable solar energy (natural & artificial) to charge, allowing for immediate and readily available usage. The mild microcurrents are created by drawing in light via the embedded solar panel. Whether it is natural or artificial light, as as long as you are in a well-lit room, your device is ready to use. No need for additional cables and outlet SŌLEIL delivers a very gentle microcurrent. Sensations from the microcurrents vary with each individual, most can feel nothing while others may feel an ever-so lightly.