【1750-2580/3670-5400 M³/H AIR VOLUME】- Max 3900/5400 m³/h large air volume can deliver maximum airflow exactly you want in a very short time with little effort, thus, being powerful and performing stably. 【SOLID CONSTRUCTION】- This cylinder fan features copper coils, solid &antirustaluminummotorcasing7aluminumblades2highdensityprotective fan guards steel housing construction, which all help to make this ventilation blower durable enough for long-lasting use. 【ANTI-FLAMING PVC HOSE】- A matched 5-meter anti-flaming PVC material blower hose is provided free of cost for your easier installation and operation. 【HUMANIZED DESIGN】-Compact structure makes this basement ventilation fan easy to carry and operate. With a handle and 4 rubber feet on it, including the extra two free for your easy replacement. Plus, this portable kitchen ventilation fan is super ideal for confined spaces, factories basements, weeding booth, attics, etc. Welcome and I wish you a happy life, my friend.