COLD AIR DIFFUSION TECHNOLOGY: This waterless aromatherapy diffuser adopts the Cold-Air Diffusion Technology which takes the high-quality fragrance oil micro-droplets to everywhere in your home without any heat or water. NATURAL HEALTHY SAFE: This scent machine brings the scent by nebulizing, which avoid any water dilution to the oil, so you could get the pure essential oils which is natural and completely safe for kids and pets. Use the Diffuser to exert the BEST effect of the essential oils. PORTABLE MESS FREE: And this waterless scent diffuser is portable for your travel, camping or business accommodations, it?s very easy to be taken. Most important is that the scent diffuser can be easily installed on any wall, Just plug-in. SUPER QUIET: Operates at a noise level below 38 dB, you can enjoy the fragrance without added sounds, making it easy to fall asleep, perfect for nighttime in the bedroom. This whisper-quiet design ensures you'll feel relaxed in no time.