Portable Cooling: Enjoy free-flowing cooling air for personal spaces with this BLACK+DECKER portable desk fan cooler. Perfect for your desktop, home office, bedroom, kitchen & more. Three Fan Speeds: Enjoy three speeds with a simple push of a button on our mini fan cooler: Low, Medium, & High. Choose how you like your air with your new small desk cooler. Water Tank & Run Time: This outstanding personal cooler is powered using a micro-USB cable that is included and offers a 0.5L water tank that runs up to 8 hours per refill. USB Powered: Included with your cold air fan is a 39” micro-USB cable for simple plug & play operation. Cooling fan can be used with any standard USB outlet on your PC or laptop device. LED Light Feature: The water tank features a water level indicator with convenient LED lighting. The nightlight feature offers 6 steady color options and a rotating color feature.