2 Modes and Breathing Light: Press the button once for continuous mist, press a second time for intermittent mist, third time to close the mist. Press and hold for 3 seconds to turn on thebreathing light. The lighting is soft and there are seven color changes, providing a soothing glow for you to relax. Quiet Humidifier: Quiet operation below 30dB keeps you in a quiet and comfortable environment without disturbing you whether you are sleeping or working. Optional night light provides a soothing glow forrelax. Portable Humidifier: The humidifier is small, portable and is powered via USB. Very convenient to carry and use. We recommend adding mineral water to the tank to enjoy the cool mist, without leaving dripson the table. Lasting Effect: After filling with water, the humidifier can continue to work for up to 8 hours (continuous mist); 10 hours (intermittent mist), create a comfortable environment for you. Cute Humidifier: The cute baby humidifier is small and portable, also a perfect gift and a stylish decorative piece, very suitable for use in bedrooms, offices, cars, baby's room.