The Zalman MFC2 Multi Fan Controller is a 5.25" drive bay device used for monitoring and controlling fans and temperature readings. The MFC2 can connect to up to four fans (of which one can be a 4 pin PWM fan). From these four fans you can monitor and control the fan speed with the use of a jog dial. The fans can be dialed up to a maximum of 5490 RPM and a minimum of 1000 RPM. Animated pin wheels show the fan operation. In addition, the MFC2 can alarm and indicate when a fan fails. Four temperature sensors can also display temp readings and a power load meter displays the power usage of your system.