I purchased this from Amazon (May) and charged it, but haven't used it. [The following is the product description from Amazon] ⚪︎【7-Color Light Therapy - Makes Skin and Mind Shine】With just 3 minutes of care every day, you'll regain your natural beauty. ●7 types of light ●High-frequency vibration for removing dirt, ●3-stage constant temperature penetration, ●EMS lift care, and other diverse functions. ⚪︎【Radiant Skin - Blissful Reset】"CLEAN mode" combines 3-stage high-frequency vibration + ❶ Green light (520-540nm) or ❷ Pale blue light (450-470nm). It adsorbs dirt and thoroughly cleanses deep into the skin. ●Green light harmonizes skin weakened by sunburn, etc. ●Pale blue light leads relatively good skin to even cleaner skin. ●【How to Use】When washing your face, apply makeup remover to your face and neck, and use CLEAN mode. ⚪︎【With the Power of Warmth - Deep Penetration Care】"HOT mode" combines a 3-stage constant temperature function of 39℃/42℃/45℃ + 3-stage high-frequency vibration + ❸ Red light (620-650nm) or ❹ Purple light (380-450nm). It delivers beauty ingredients to places that can't be reached by just applying them by hand, leaving a moist and supple feeling. ●Red light enhances skin vitality and firmness. ●Purple light repairs damaged skin. 【How to Use】After washing your face, apply lotion or serum to your face and neck, use HOT mode, and slowly move it forward over your skin. ⚪︎【For Unwavering Beauty - Painless EMS is Key】"EMS mode" combines 3-stage microcurrent + ❺ Blue light (470-490nm) or ❻ Yellow light (580-620nm) or ❼ Cyan light (490-520nm). According to the "Arndt-Schulz law," moderate stimulation awakens the skin and muscles. Low-frequency EMS only moves the skin surface, is less effective, and causes pain, but the Rowroo beauty device is equipped with a high-frequency EMS function, which gently stimulates the skin surface without pain and firmly tightens and trains the deep facial muscles. ●Blue light reduces redness and relaxes the skin. ●Yellow light brings out skin brightness and luster. ●Cyan light maintains skin moisture and conditions the skin as a measure against sagging. 【How to Use】After washing your face, apply serum or cream to your face and neck and use EMS mode. While touching the microcurrent bars on both sides with your hands, slowly move it forward over your skin. ⚪︎This is a multi-functional beauty device that can be used not only on the neck, but also on the face, décolletage, and even the whole body.