LED desk lamp offers 3 brightness levels, Comfortable, flicker-free lighting for reading/work/study; pleasant on the eyes, causes less fatigue, 360 swiveling lamp, youu0026#39;ll get a perfect angle to meet your specific needs.nElectrostatic Ionizer Purification - Negative ions can remove airborne pollutants as small as .01 micron such as allergens, pollen, mold, smoke, pet dander, unpleasant odors, dust, and other airborne irritants.nIt can also be used as a night light. The warm color is not too bright or too dim.n2 kinds of power supplies: Use USB power supply or use the built-in battery power supply, it is cordless and rechargeable.nBriteLeafs 3-in-1 Air Purifier Ionizer / LED Desk Lamp / Night Light - Cordless, Rechargeable LED desk lamp offers 3 brightness levels, Comfortable, flicker-free lighting for reading/work/study; pleasant on the eyes, causes less fatigue, 360 swiveling lamp, you'll get a perfect angle to meet your specific needs. It can be used as a night light. The warm color is not too bright or too dim. Electrostatic Ionizer Purification - Negative ions (O1) remove airborne pollutants as small as .01 micron such as allergens, pollen, mold, smoke, pet dander, unpleasant odors, dust, and other airborne irritants. 2 kinds of power supplies: Use USB power supply or use the built-in battery power supply.