4 Pack Silent Plug In Air Purifiers,Portable Filterless Ionic Air Purifier with 4 Carbon Brushes,Wall Mounted Negative Ionizer for Home,Ion Pure Air Ionizers for Office,Kitchen,Travel Hotel

["Ultra-High Ion Output — 4-Head Carbon Brush：Powered by a high-density negative ion generator, the 4-head carbon brush design releases up to 250M negative ions (110V:150M / 220V:250M) to bind airborne particle, helping lower the particles that collect in homes over time","Whisper-Quiet, Fanless Sleep Mode：Fanless plug-and-play operation runs below typical bedroom noise levels so it won’t disturb sleep, study, or office work. Very low power draw makes it ideal for continuous overnight use","Filterless & Maintenance-Free：Unlike traditional units, this mini air purifier requires no filters or cartridges — eco-friendly, cost-saving operation with continuous ion emission. Simple plug-in design removes filter chores and reduces lifetime upkeep","Compact, Wall-Mount & Travel Ready：Slim wall-mountable plug design fits any outlet, frees floor space, and travels easily for hotel or RV use. Lightweight and unobtrusive for kitchens, living rooms, and pet areas","Faster Odor & Smoke Relief：High-density negative ions charge and settle particle, reducing particle quickly and keeping routine cleaning minimal. Fits tight spaces where full units won’t"]