Features Nano-class Cool Mist Humidifier Designed with one nano-class high-frequency micro-porous atomizer plate. It adopts ultrasonic technology to oscillate & decompose water into fine nano-class cool mist molecules, which can quickly penetrate the underlying skin & relieve dry skin. User-friendly Design Lightweight & compact, this portable water bottle-shaped humidifier can hold up to 180ml of water & produce up to 30ml of moisture per hour. Fit for most cup holders in the car. The maximum applicable area is about 100 square feet (10 square meters). Both the main engine & water cup are detachable, easy to clean & use. Two Adjustable Mist Modes Press the button to switch the mist mode. In the continuous mist mode (when the indicator light is blue), it keeps spraying mist & supports up to 3 hours of use. In the intermittent mist mode (when the indicator light is red), it sprays mist & stops with an interval of 10 seconds & supports up to 7 hours of use. Whisper-quiet Ultra-stable nano-class atomizer plate provides gentle & stable mist, creating a quiet & relaxing environment (less than 30d B). Low consumption & low noise make it perfect for sleeping or reading time. Work quietly without producing any bothering noises. Water Leakage Protection The main control circuit board & the water cup are separated from each other, providing effective water leakage protection (within 90 degrees). It is safe to use in cars. Suitable for using at home, in the office, in the car or on the go. Safe & Reliable With the built-in water level sensor, this product will automatically power off when the water level is lower than the safe water level. Compatible with any USB (Universal Serial Bus) power source (AC power adapters, car chargers, laptops/computers, or power banks), universal & convenient. Safe with a 5V low voltage input. Note: 1. Please add water below the max line of the water cup. 2. DO NOT use with hot water, high purified distilled water, essential oil or aroma.