NO SOUND DESIGN: Only produces less than 35 decibels of sound, very quiet, gives you a perfect sleep. You can even use it for children and pets at home. Press the button for 1.5 seconds and the light will turn on automatically. Press 1.5 seconds more to turn on the light. The humidifier produces ultra-small water drops and a large amount of oxygen ions into the air around you that absorb and take away and clean items around you and the air to make you feel happy, clean and happy driving experience IMPROVE CAR AIR QUALITY This humidifier can purify the air, release more oxygen, give your environment a sweet breath, and exude your leather products with more humidity and make you feel energetic. Dreamy gift: the perfect mini USB humidifier, portable for any small area, e.g. car, desk, bedroom etc. Perfect high-tech gift idea makes everyone will.