electric cigarette air freshener hepa ionizer smoke cigarette car desktop wind speed rechargeable desk smokers front protect keep smokeless rooms glutters wind ashtrays round different colors electric cigarette air freshener hepa ionizer smoke cigarette car office wind speed rechargeable desk smokers front protect keep smoke free parts glutters wind ashtrays tower colors 2-step air volume change: You can adjust the air volume in power saving mode and boost mode . There are two working modes, "low speed mode" and "high speed mode". It is very convenient to switch modes by lightly touching it with your fingertips. Rechargeable: This is a rechargeable smoke exhaust equipped with a 4000 mAh battery and can be used up to 5 hours when fully charged . This means that you have to change the batteries frequently. Easy to clean: easy to remove and clean. The strainer can be easily replaced. Small, easy to carry, it can be used for home travel, business travel and business travel.