1. 10 million negative ion ,30 minutes after negative ion intake, the lung is able to inhale 20% more oxygen and exhale 14.5% more carbon dioxide, they greatly benefit people's health and everyday routine, which can facilitate body growth and disease prevention . 2. Seven colors of lights , not only a decorate of the products , also have night light function . 3. 32dB low noise , can working during your sleep time . 4. portable design, USB power connection, very convenient for use . 5. HEPA + active carbon filter   Shenzhen Guanglei was founded in 1995. It is a leading enterprise in the production and manufacturing of environmental friendly household appliances integrating design, R&D, manufacturing, sales and service. Our manufacturing base Dongguan Guanglei covers an area of about 25000 square meters. With over 27 years’ experience, Guanglei pursues quality first, service first, customer first and is a reliable Chinese enterprise recognized by global customers. We sincerely look forward to establishing a long-term business relationship with you in the near future. Our company has passed ISO9001, ISO14000, BSCI and other system certifications. In terms of quality control, our company inspects raw materials, and conducts 100% full inspection during the production line. For each batch of goods, our company conducts drop test, simulated transportation, CADR test, high and low temperature test, aging test to ensure that the products reach customers safely. At the same time, our company has mold department, injection molding department, silk screen, assembly, etc. to support with OEM/ODM orders. Guanglei looks forward to establish win-win cooperation with you.