HIGH CFM:80mm fans 80 x 80 x 25 mm 8cm cooling fans high airflow 3500RPM for desktop pc computer cpu case , electronics equipment heatsink radiator or other industrial cooling. EASY CONNECTION: 80mm 2Pin XH 2.54 connector fans with connection protection,easy operation,even wrong connected,fan will not burn but just not work. 24V DC: 24V DC fan 80mm 0.25A mini dc fan ,With PBT material,good insulation and heat resistance,tough and durable quality.The fan's speed can be adjusted by using a different voltage (5-24V),it can work at a lower voltage to achieve a silent effect. LONG LIFE BEARING:Long Life Sleeving Bearing cooling fan,this makes sure the Required Cooling and Minimizes the Noise Level. 100% 90 DAY MONEY BACK: If you are not satisfied for any reason, simply return your product for a full refund, no questions asked. You have nothing to lose.