Speed: 1. Charge the device for 3 hours before first use. 2. Fill the 300ml water tank. 3. Select one of the 3 modes (soft, normal, pulse) using the mode button. 4. Insert the desired tip (classic jet, tongue scraping, periodontal, or orthodontic) into the nozzle, ensuring it's fully inserted. 5. Place the tip in your mouth and guide it along your teeth and gums. 6. After use, remove the tip and rinse it under clean water. 7. Store the device with the tips attached to allow for proper air-drying. 8. Avoid using the device while sleeping or in the shower to prevent accidental water ingestion or device damage.