Purify the air wherever you go 100% USB Powered Add your favorite essential oil (not included) PureSpa USB plugs into any USB port to diffuse your favorite essential oil and create a soothing fragrance. This on-the-go aromatherapy solution uses mini fan technology to emit gentle bursts of fragrance into the air in your immediate vicinity. If you have been searching for an all-natural way to keep your office, home or car smelling good, PureSpa USB offers the perfect portable solution. Product Specs: Size 3.4" x 1.5" x 0.63" Rated power: 0.8W Coverage Area: 90 sq.ft Weight: 0.62oz Input voltage: 5V (USB powered)