Description : This cooling fans suitable for cooldown Wifi Router / Modem / TV Box / Laptop / PC / Gaming Box. Usually Router/Modem/TV Box come with USB Port, can direct plug and play. If your device don't have extra USB Port, you can power it up with Power Bank / Phone Charger / Laptop. Easy to install, USB Connector Plug & Play. Fan come with Anti-Slip Rubber Stand, less noise and look better. Specification : Size : 12CM / 8CM ( Choose in option ) Casing/Cover : Single Side / Double Side ( Choose in option ) USB Connector Wire Length : 1 Meter +- After installation product height : 4CM+- Noise : 31 dba (Silent) Bearing Type : Sleeve AirFlow : 8CM=40CFM , 12CM=70CFM Speed : 8CM=2000RPM , 12CM=1200RPM Item included : 1x Fan(Size choose in option) , 4x Screw , 4x Nut , 4x Anti-Slip Rubber Stand. 1 or 2 Fan Casing Cover (Choose in option)