Features - All-weather air purifier that does not need separate power supply or a cable. - Semi-permanent air cleaner that requires neither maintenance nor filter change. - Portable air cleaner to which silver nano concept is applied - The smallest and lightest air purifier in the world - Generates the maximum 2,000,000 ion/cc - Multi-purpose air cleaner to be used as necklace, power consent, computers or vehicles - Three patents and two design patents Specifications Input power: DC5V (USB PORT) / 3.7V/300mA charging battery, 30mA. The lightest in the world: 25g Anion generation: 2,000,000/cc Color: black, red wine Sizes: 75(W) x 22(D) x 27(H) mm Capacity: 16��/p>