AeroCool Unique Shark Fin like blade design high performance high airflow Shark 120mm Blue LED fan. Total 15 fan blades generate Extreme High Air Pressure and High Air Flow for maximum cooling effect. Generate airflow of 83CFM at only 26.5dBA. Innovative Fluid Dynamic Bearing delivers longer life span, higher precision rotation and anti-shock function. Duo Mode Operation - The Shark fan operates in both "Power" mode (12V) and "Silence" mode (7V - with adaptation of Voltage reduction cable). All cables are "black" sleeved.