The product adopts Ion group technology and ESP dust collection module, producing lots of Ion through the high-pressure discharge，below are the exact features of this product:● Fresh air, clear up the smoke and dust.● Can improve the sleeping quality, if use it on the night table.● Eliminate electrostatic radiation, if use it at the side of computer.● Lithium battery inside, can be used anywhere.● With continual working /automatic cycle mode, and humanized design● With smart structure, convenient travel carriage.● USB/AC charge.USB Air purifier1) Product size: 11.5x10x3cm2) Net weight: 130g3) Power: <1W; Lithium battery in side/USB power4) Ion output:600x106/cm35) Ozone output:<0.04ppm6) Effective area: 15m2Color Box:12.4x12.5x5.8cm