[Portable Small Humidifier]: 500ml capacity Space saving design.Small Size cool mist humidifier for bedroom nightstand and office desk, fitting narrow space for better air wherever you are.[Night light function]:The night function humidifier is very easy to operate. One button controls for all functions, you simply need to press and hold the key for 1.5seconds will turn on the white light.Press and hold again to turn off the light.[Personal Humidifier] :Which is powered by built-in 2000mAh battery,The humidifier can be charged Notebook anywhere with a USB plug.Best travel humidifier.[Two spray made]: 8hours for Continuous spray, 16 hours for intermittent spray. The product will stop spraying automatically when over use time.[Customer Service]: Humidifier Filters Size: 0.3*5inch. Provide free online customer service. We promise to answer within 24 hours . If you have any questions, please feel free to contact us, we are willing to answer your questions.