Mini Bottle Ultrasonic USB Air Humidifier Cool Mist Aroma Diffusor Nightlight Features: 1. Ultrasonic operation. This adorable humidifier is with high-frequency vibrations to generate a micro-fine cool mist. 2. With LED lamp, it can also be used as the little night light. 3. Automatic power off after been working 4 hours, ensure the safety. 4. Add essential oil in water, can be used as an aromatic machine, giving you a SPA at home. 5. Full closure silica gel, the water won't come out even if knock down the bottle carelessly. 6. Powered via USB port, can connect to a portable power source, computer. 7. Press the switch for the first time, the LED light and humidifier work together. Press once again, the light turns off, and the third time, humidifier turn off at last. 8. Portable and removable tank and easy refilling. Operation guide: 1. Open the cover, and add water into the container. 2. Cover the container. 3. Connect USB cable to your computer. 4. Press the button to spray. Tips: 1. Please add water in a time when used up. 2. There is a spring in the humidifier, don't lose it. The humidifier won't work without it. 3. Please keep the mouth of the spray clean and put the product in the clean place when you don't use it. Specifications: - Material: ABS resin + electronic components. - Water capacity: 180ml. - Power: USB. - Input: DC 5V. - Consumption: 1.5w. - Fog volume: 40 - 50ml / hour. - Time: 4 hours auto power off. - Size: 5 x 18cm (D x H).