Item: USB Air Purifier Model No.: YL-100         Features:         Input Voltage: 5V DC Power: <1W N-Ion Density: 3x 1.000.000pcs/cm3 Ozone Density: 5mg/h Sizes: 170x66x 60mm Net Weight: 200g Gross Weight: 220g Light: LED(flash)         Accessories: Basement ,USB connecting line. Working Principle: Ionizer Colors: Silver,         Outer Packing:         Color/neutral box         product   Advantages: Decreases radiation, protect eyesight         Removes the smoke dust, refresh the air         Has negative ion and ozone function         Activates the physical strength and prevents the diseases Application:         Computer, toilets, bedroom, hotel, restaurant, office Approval: CE