Ortur Smoke Purifier 1.0 for Laser EngraverAbsorb smoke and dust and purify the air. Powerful 3 layer filtration function can filter 0. 3m, achieving a 99. 97% purification rate. The front cover can be opened with one key to replace the cartridge quickly. A large air volume of 258m h can efficiently exhaust smoke. Noise50dB, providing you with a quiet working environment. 360 rotating tube, good air tightness, sharp and strong, flame retardant materials firmly.