Zalman introduced its ZM-MFC2 multi fan speed controller last year at CES, and the reason we're reviewing it today are three-fold. For starters, the Zalman ZM-MFC2 digitally monitors four fans to +/- 10RPM and displays that data in real time on a nice multi-coloured backlit LCD display. With it, you can set any speed from 60RPM to the maximum supported by the fan with a turn of the dial, for three 3-pin fans and one PWM fan.