This negative ion air purifier with highest output - up to 35 million negative ions/sec, filterless mobile Ionizer & travel purifier clean : pollutants, allergens, mold,odors etc. Efficient Purification: Ten of millions of negative ions can effectively clean the indoor polluted air and harmful substances, such as secondhand smoke etc. Lifetime：30000Hours Power: 0.5W Material: ABS Plastic Recommended Room Size: 20m³ Negative ion concentration: 350 Million Noise: ＜5DB Working Voltage：AC 100-240V Working Temperature: 0℃-50℃ Working indicator: Green Product Color: White Plug Type: US Plug / EU Plug Package Contents: 1 x Air purifier