1、Super easy and convenient to use. Customized special wire is very durable 2、Manually / Automatically adjust the four fans’ speed to control the computer temperature. 3、One button to reduce the noise effectively. 4、Avoid the computer being damaged by overheat to prolong the its service life-span. 5、hen the temperature is higher than 70° or the fan breaks down, it will alert immediately. Features: 1. Super easy and convenient to use. Customized special wire is very durable. 2. Manually / Automatically adjust the four fans' speed to control the computer temperature. 3. One button to reduce the noise effectively. 4. Avoid the computer being damaged by overheat to prolong the its service life-span. 5. When the temperature is higher than 70° or the fan breaks down, it will alert immediately.   Specifications: Color: Black Installation Site: Drive position Controllable Fan: 4 fans, Manually / Automatically adjustment Materials: Aluminum magnesium alloy Power Supply Interface: large 4P male + female Fan Interface: 3PIN + 4PIN interface Cable Length: 60cm / 23.62inch Max Power: 30W Size: 14.9 * 8.8 * 4.2cm / 5.87 * 3.46 * 1.65inch Package Weight: 340g   Package Includes: 1 x Computer Fan Controller