Speed: 1. Charge the device using the USB cable provided. 2. Select the appropriate cleaning mode (Soft, Normal, Middle, Strong, or Super) based on your needs. 3. Wet the cleaning head and apply toothpaste. 4. Place the cleaning head against your teeth at a 45-degree angle and move it gently along the gum line. 5. After use, clean the device by rinsing it with water and storing it with the protective cover. 6. Replace the cleaning head every 3-6 months or as needed. 7. Always follow the safety guidelines provided in the user manual.