12-stage filtration, 12-liter storage, High quality grey & Black color filters. With Active Copper Filter Series. Be Sure to Drink Pure. Branded UV LED and Mineral for best-in-class purity. Elegant black look, Storage 12 Liters. The purifier has a multi-stage purification due to its RO+UV+UF+TDS controller and filters. The pre-filter and sediment filters contain microns that sieve out impurities and sediments.