We are a developer and manufacturer of mist makers for over 10 years, with 200 skilled workers and technicians abiding by strict ISO 9002 standards. All our products meet UL, BS, GS, CSA, CE/EMC standards.We offer a two-year warranty for all our products besides the long-term after-sales service. Delivery is usually within 15 days.The products utilize electrical cillation frequencies, via ceramic disc's high-frequency resonance to create natural white mist/fog on the surface of water. No heat nor chemicals is needed. They enhance indoor humidity and generate negative ions to freshen air. A few drops of fragrant oil or disinfecting oil can be dripped into the water, with the effect similar to an incense burner, giving out clean and natural fresh air. Matching transformer safety lower voltage is attached."Purple Mist Humidifier" - an anion humidifier and decoration lamp with creative combination of the mist, water and magic lighting. The white fog takes you into the illusion universe endlessness daydream. While the ultrasound generates a large number of air negative ions, constantly improving air humidity. It has obvious assistant effect for modern air-condition illness, asthma illness as the best refill for traditional incense burner, keeping fragrance last while maintaining wonderful high value of crafts.