The Vevor scent air machine is a waterless HVAC essential oil diffuser designed to fragrance spaces up to 5,000 sq. ft. It uses cold air diffusion technology to disperse fine nano particles efficiently while maintaining low oil consumption. Bluetooth app control lets you manage power, timer functions, and 21 diffusion levels for a customized aromatherapy experience. Its quiet operation and flexible wall-mount or freestanding installation make it suitable for homes, offices, hotels, spas, and other large spaces.