The product is a set of five Sunon PF40561BX-Q020-S99 dual 40mm fans with a 4-pin DC 12V power connection. Designed for computer cases, these fans are specifically made by the brand Sunon and operate on a voltage of 12V. Perfect for cooling systems in servers or personal computers, these fans have been tested for reliability and efficiency. Ideal for improving ventilation and overall performance of computer systems, these high-quality fans are a practical choice for those looking to enhance their cooling setup.