The GreenAir Lattice Air Diffuser infuses a room without the need to fill (and refill) a water reservoir. Use anywhere without the fear of drips or spills. Ass 5-30 drops of essential oil to the included pads and press the power button. Cute looking and works great!! Provides big scent experience in small footprint of a portable size. 4″ x 4″ x 7″, Coverage up to 200 sq ft. Run time is continuous.