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.