1. Apply your preferred serum to the targeted areas of your skin. Turn on the device by pressing the start button. 2. Use the M key to select your desired function, such as heat, vibration, or phototherapy. 3. Gently massage the metal head over your skin in circular motions for 3-5 minutes until the serum is fully absorbed. 4. Adjust the light and temperature settings as needed for your comfort. 5. Once finished, turn off the device and clean the metal head with a clean, dry cloth. Avoid washing it with water.