The rear portion of the Kama-Meter Multi-Functional Controller securely houses the most important piece of the unit, the Printed Circuit Board. The PCB is professionally designed with all the components organized and no exposed solder joints. There are four existing channels for fan control although there is no indication in the documentation or on the Scythe website what the maximum wattage rating is per channel. By rotating the chrome silver knobs from left and right allows you to vary the power wattage ranging from 7 volts to 12 volts. There are four additional 2-pin headers for the bundled thermal probes allowing consumers the option of monitoring temperature levels from four different heat sources. The unit itself requires 12V of power and simply connects to spare 4-pin Molex connector from the PSU.