What It Is  Act on all wrinkles - even the deep ones. Experience the future of anti-aging with the Rénergie Nano-Resurfacer 400 Booster.   How To Use  Use with Rénergie H.C.F. Triple Serum (sold separately). Starter Pack includes 12 cartridges to complete a 4-week protocol.   Recommended Frequency: Use 3 times per week. Allow 48 hours between each use.   Precautions: Avoid using on lips, the eye area, or eyelids. Avoid direct contact with eyes. Step 1: Apply your Rénergie H.C.F. Triple Serum all over the face. Step 2: Turn on your device and place the device head in direct contact with your skin. Step 3: Gently glide the device outwards over the skin in a circular motion in the indicated zones. Step 4: Apply your moisturizer cream. If used in the morning, do not forget to apply your sunscreen. Follow the full usage protocol included in the User Guide inside. Do not operate on the same part of your face more than 3 times per session. Limit use to no more than 3 seconds on each area at a time.   1 Piece.