About this item Powerful Adjustable Clip: This grow tent fan come with a sturdy multi-purpose clip for poles up to 55mm/2.16 inches. It can easily and securely tight on round, square poles, and flat surfaces without slipping, The clip fan has a thick rubber pad to ensure it does not slip or scratch surfaces Auto Oscillation Automatic 90° horizontal oscillation and 110° vertical manual adjustment of this clip on fan provide wide-angle coverage and airflow to reduce plant stress and promote plant growth. Idea for grow Tent, greenhouse, gardens, growing shelf, growing racks and plant shelf Long Battery Life: This rechargeable grow tent fan has a built-in 10,000mah battery that promote good air circulation in grow area upto 42 hours, even if in an emergency power outage. Running at only 5.5W ( 1 KW·H / 180Hrs), it ensure better airflow and saving your electricity bill as well Powerful Yet Quiet: With 4 adjustable speeds and a noise level of only 25-45 dB of this battery operated greenhouse fan, it can provide a gentle breeze for seedlings as well as strong airflow for flowering. Provide your greenery with a growing environment closer to nature Easy to Install: Specially designed for plant tents, 7 inch compact size and free mount clip makes this air circulation fan suitable for various occasion and easy to install, with the stable base, you can place the fan directly on a horizontal surface to ventilate your plants and cool yourself