Up to 3 Days Run Time: Homech Ultrasonic Humidifiers are designed with a large water tank to hold 6L / 1.60 gal of water for up to 60hrs continuous mist output at 60-300ml/h – frees you from refilling water frequently Warm Night Light: Humidifiers for bedroom with a soft night light promote sweet dreams – press the light button to turn on/off the night light and hold for 1.5s to turn on/off the tank light 26 dB Ultra-Quiet Patented Water Silencing Design: Patented water dripping system reduces the working noise under 26 dB for a comfortable and quiet environment for sleep or study Provides a Sense of Security: The smart ultrasonic air humidifier is designed with a physical sensor that is used to detect any drop in water level to prevent dry-burning Easy to Clean & Refill: Built with a 9cm / 3.54in water inlet for easy refilling and cleaning, large enough to fit your hand into the tank to clean it thoroughly