Why Does the Upgraded ARO-PRO HVAC Diffuser Set Itself Apart from Others? || Key Features: Extensive Diffusion Capacity: Diffuse coverage for up to 4,000 SQFT. Bluetooth Control: Seamlessly manage your scent experience with user-friendly Bluetooth control at your fingertips. Advanced Cold Air Diffusion Technology: Cold air diffusion technology transforms the essential oil into very fine, dry nanoparticles for more consistent coverage while maintaining the purity of the scent. Residue-Free: The high-pressure dispersion process produces a light, dry nano-mist that stays suspended in the air for longer periods, offering more consistent coverage without leaving any residue. Safety Assured: Carefully designed to be safe around pets, children, and furniture. Customizable Time Settings: Adjustable 24-hour and 7-day time settings provide personalized diffusion control. Large Capacity: Equipped with a generous 800ml bottle for prolonged usage. Versatility: HVAC, stand-alone, and wall-mounted options. Suitable for large commercial and residential spaces. Decor Appeal: Luxurious and modern metal design. || New features of the ARO-PRO HVAC diffuser by Aromely include improved app connectivity, a multi-speed fan, and advanced atomization technology that enhances its silence and efficiency. The design has been upgraded, and the bottle size has been increased from 500ml to 800ml. Now offers multi-angle diffusion. The ARO-PRO is a professional HVAC diffuser ideal for both commercial and residential applications. It is perfect for mid-sized environments such as single-family homes, medical offices, warehouses, and restaurants. Utilizing advanced cold diffusion technology, the ARO-PRO transforms essential oils into a lightweight, dry nano-mist that remains suspended in the air longer, ensuring comprehensive coverage without altering the scent or therapeutic benefits of the oils. This residue-free atomization technology is safe for pets, children, and furniture.