Cold Air Diffusion Technology - The professional nebulizing diffuser is equipped with the latest cold air compression technology  that uses a powerful combination of cold-filtered air and highly pressurized air. It could converts essential oils into micro-particles into a consistent, naturally healthy aroma.Cover Up to 2500 Sq.ft - The Miylee scent diffuser has an incredible 2000 to 2,500 Sq Ft coverage. It can be used to cover an entire home, office, spa or commercial space. The waterless essential oil diffuser supports full spectrum on all essential oils..Smart with Bluetooth App - waterless aromatherapy diffuser is very easy to control for every customer. Download the app, through bluetooth to connect with the machine, setting the working time and scent grade.If you do not want to download the app, the machine can also work by press the setting button manually.Natural and Safe -This upgraded new scent machine releases pure dry aroma mist, avoid any water dilution to the oil,is completely safe for PETS & KIDS, so you can enjoy all of the wonderful benefits of our aromas without any of the worrying.MESS Free & Low Noise - Unlike other cheap essential oil diffusers that make a mess, leaving oily and wet residue around your room, our waterless scent diffuser is completely mess-free. Only 38db working noise allows you to relax and not waste any time cleaning. can also be easily installed on any plat or floorPortable Size for Place - This scent air machine allows you to enjoy the fragrance of your choice in a variety of settings. Place this scent air machine anywhere.but also easily connect it to a standard HVAC and have it installed as part of your home's ventilation system (note that the hose does not come with this device, but can be easily found)1 Year Money Back Guarantee - We are committed to bringing customers a perfect shopping experience.if you're not completely satisfied with the product we will provide a replacement or full refund for 1 years after purchase date. Feel free to contact us, we will provide our professional solution until you get a satisfactory answer.! Product Description Our scent diffusers for home hotel collection use cold-filtered air pressure to break oils into a dry mist of nanoparticles for consistent, subtle scenting & optimal therapeutic properties. With 400ml bottle, it can meet the demand of long time working and cover large space. Cold Air Diffusion Technology Using cold filtered air pressure to break down the essential oil into a dry mist of nanoparticles, we ensure consistent and subtle scenting while preserving the therapeutic properties of the aroma oils. Smart with Bluetooth App Through bluetooth to connect with the machine, setting the working time and scent grade.If you do not want to download the app, the machine can also work by press the setting button manually. Natural and Safe No aerosol, no VOC, and no toxic chemicals! This hypoallergenic and BPA-free home HVAC scent system is safe for families and pets. Small Machine Do Great Things This machine size is 6.3*8.3inch,easy to install,but could cover up to 2500 sq ft. 400ml Big Spill-proof Bottle With 400ml bottle, it can meet the demand of long time working,save a lot refilling time. Schedule Playing Time working time is adjustable from 10 to 120 seconds,stoping time 20-900 seconds, Easy to set on Mobile app.