100% BRAND NEW! Weight: 22g Size: 89.5 x 21.5 x 21.5 mm This ionizer is a USB-powered purifier that uses a carbon fiber brush system to emit healthy negative ions into the air. The negative ions attach the air molecules, any impure particles and negatively charge them. The emitted negative ions purify the air and remove the toxic substances including dust, odors and moulds. Can be connected directly to a computer USB port Production of negative ions. Remove odors and dust. Eliminate airborne allergens, pollen, smoke. Reduce static and EMI. Helps boost your energy and mood. Green LED light indicates working. Specifications: Density of anion: 1 Million / cm3 Rated voltage: DC 5V Rated power :< 0.3W Package content : 1 x USB ionizer 1 x English Manual