ARO-PRO BY AROMELY  UPGRADED - DESIGN AND TECHNOLOGY: New features include: Improved APP connectivity, multi-speed fan, new atomization technology making it more silent and efficient, improved design, increased bottle size from 500ml to 800ml, multi-angel diffusion. Key Features: Diffuse coverage for up to 4000 SQSF. Bluetooth controlled. Cold air diffusion technology transforms the essential oil into very fine, dry nanoparticles for more consistent coverage while maintaining the purity of the scent. No residue. Safe for pets, children, and furniture. Adjustable time setting 24 hours and 7 days. Large bottle of 800ml. HVAC, Stand-alone and wall-mounted Commercial and Residential Luxurious and modern metal design   Professional HVAC scent diffuser suitable for commercial and residential applications. ARO-PRO by Aromely is perfect for mid-size applications such as single-family homes, medical offices, warehouses, restaurants, etc. ARO-PRO uses advanced cold diffusion technology which means that during the high-pressurized dispersion process the essential oils are transformed into a lightweight, dry nano-mist, which stays suspended in the air longer offering more coverage without altering the smell or the therapeutic benefits of the essential oils. This type of advanced atomization technology is also residue free and safe for pets, children, and furniture.