The 3.5" Blue Aluminum HDD Cooler with Dual 45mm Cooling Fans is a high-quality cooling solution designed specifically for hard drives. The dual 45mm fans provide efficient cooling to keep your hard drive running smoothly, while the aluminum material ensures durability and heat dissipation. With a 12V voltage requirement and 4-pin power connection, this HDD cooler is easy to install and provides reliable cooling performance for your computer system.