... 43*72.5cmCarton Packaging:5 piece/CartonNegative ions:ozoen generator (ozoniser):1,Use high-quality enamel casting tube, the oxygen purity, ... to distinguish, more health; 9,Small space, water, gas dual-use, simple operation, can be standing or hanging, is more practical ... makes use of this principal, taking air as material and aid of high voltage and frequency.Negative ions ozone generator function ...