better after-use experience Temperature reduction provides an expected longevity extension and higher performance of a critical network component,These fans are overall very helpful for devices that get a bit hot and start to throttle down.choice of most usersIt works great,for DIY cooling fan or as an additional cooling,fan for your gaming needs. like as Camera NVR,andriod box,stereo,T-Mobile gateway. Good balance of quiet and airflow. keeping electronics cool.Three specifications of fans,suitable for more usage scenarios.Custom shock absorbing feet four feet using environmentally friendly rubber,after testing,the softness of the feet that can smoothly grab the desktop,not too hard and desktop resonance.Fan parametersConnecter: USB; Cable Length: 55cm Or 21 inches; Bearing type: Sleeve; Life: 35000 hours / Dimension: 360mm(L) x 120mm(W) x 25mm(H) / 4.7x4.7x1 in. per fan; Rated Voltage:5V 0.2A; Speed: 1500RPM; Air flow: 56.7CFM; One-year quality assurance. Please contact us,If the product has any quality problems,it will be refunded within 90 days or replaced within one year | Packing list: A finished product..