... 50Hz 2. Rated Power: 45W 3. Output of negative ion: 100, 000, 000/cm3 4. Purifying rate: 99 ... 50Hz;2. Rated Power: 45W;3. Output of negative ion: 100, 000, 000/cm3;4. Purifying rate: ... 50Hz;2. Rated Power: 45W;3. Output of negative ion: 100, 000, 000/cm3;4. Purifying rate: ... quality and long-lasting, room air is cleaned andPurified noiselessly-completely silent.6. Generate negative ions by way of high ...