New Universal NA50 Plus Room Air Purifier One Year Warranty NA50 room air purifier now works in most countries.110V-220V AC broadband voltage for UsaJapanEuropean countries This is a wall outlet plugin Uses ozone and ionization to clean the air. Great For Dorm Room And Other Smelly Places. NO FILTERS TO CLEAN OR REPLACE EVER. Covers From 50 FT to 200 SQFT Used in Hotel Rooms, Cars, Rv's,Offices,Cubicles And Much More