The Noctua Compact PWM Fan Controller (NA-FC1) is a sleek and powerful accessory designed for controlling 4-pin fans in computer cases. With a compact size of 21 x 25 x 48 mm and a black color scheme, this controller fits seamlessly into any setup. It offers a 3-way splitter for customizable fan control and operates at a voltage of 12V. Made in China, this product ensures quality and reliability for optimal cooling performance. Plus, with free express shipping in the United States, it's a convenient and efficient choice for enhancing your computer cooling system.