Features: 1) Removes smoke and dust 2) Kills bacteria and sterilizes 3) Removes peculiar odors 4) Energy-saving 5) Purifies the air 6) Promotes health 7) Environmentally safe 8) Applications: offices, homes, hotels, stores, bus stations, train stations, airports, hospitals Specifications: 1) Rated voltage: 100 - 130V; 220 - 240V 2) Frequency: 50 / 60Hz 3) Rated power: 7, 9, 11, 13, 15W 4) Working life: 10,000 hours 5) Customized specifications are welcomed