AeroCool Unique Shark Fin like blade design high performance high airflow Shark 140mm Green LED fan. Total 15 fan blades generate Extreme High Air Pressure and High Air Flow for maximum cooling effect. Generate airflow of 97CFM at only 29dBA. 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. Accessories include a Voltage Reduction cable, a 3 to 4 pin Molex converter, 4 units of Anti-vibration Rubber Screws and 4 units of standard screws. Customer Service: Supportataerocool.us or call 510-661-9948. RMA Service: RMAataerocool.us or call 510-661-9948.