120 volts ac and usb adapters are included for use at home?? in the office or on-the-go</br>Provides up to 5 hours of run time</br>One touch operation</br>Easy to remove and fill 200 ml (7/8 cup) water resevoir</br>1 speed/mist intensity</br></br>Product Description</br></br>Humidify your own personal space for the ultimate environment for healthier breathing! this lightweight device weights less than a pound and runs whisper quietly thanks to ultrasonic technology and delivers fast?? efficient results!</br><br/>http://www.amazon.com/gp/product/B005JSD2EE