Spesifikasi : Air Purifier Filter: 2EA - Micro dust removal 99.97% Fan : Dual Inverter Sensor : Respiratory Sensor Exhaust Valve : Yes Air Volume(LPM)*Liter Per Min : 10~55(Max) Operation Noise (dB) : 35dB(Min) ~ 52dB(Max) Usage Time (Fully charged) : 8hr(Max) Recharge Time : approx. 2 hours(Max) Fan Speed : Auto Voice On : Yes Battery Source : Built-in Li on Rechargeable(1000mAh) / USB C type Prodution Site : Korea