【Is Your Router Overheat Easily ?】 It reduced the temperatures of your router by a substantial amount. Whereas before the thing was almost too hot to touch at full load, it will be almost cool after you got this item. Network speeds are commensurately increased. 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. | 【Environmental & fireproof Material】Added dust filter between units. Speed selection switch is very durable, long life with 6-Years. | 【Variable Speed Controller】 The variable speed is great for turning the speed up or down to your noise comfort level. It is cycles from high-Medium-low and off speed mods. Enables the fan to be powered through an AC outlet. | 【Good DIY Cooling Solution】It works great for DIY cooling fan or as an additional cooling fan for your gaming needs. Such as router, cabinet, x-box, SSD, Modem, DVR, Receiver, Streaming boxes, Security Camera NVR, andriod box, stereo, T-Mobile gateway. Good balance of quiet and airflow. Moves enough air at low speed to keep electronics cool. | 【Warranty & Packing List】Warranty: One-year quality assurance. Please contact Seller If the product has any quality problems, it will be refunded within 90 days or replaced within one year | Packing list: A finished product.