AeroCool Shark 140mm Black Edition Cooling Fan EN55451 Unique and Stylish Shark Fin like 15 Fan Blades design Shark 140mm Black Fan Innovative Fluid Dynamic Bearing delivers longer life span with higher precision rotation and anti-shock function Include a Voltage reduction cable allow fan to perform in Duo Mode Operation either in Power mode or Silence mode Accessories include a Voltage Reduction cable and a 3 to 4 pin converter cable and 4 units of Anti-vibration Rubber Screws and 4 units of standard screws 12V DC fan