This is a very aggressive, universal cooling and venting unit. This unit can be used as a spot cooler or for various rack applications as it allows for advanced and unique applications. It features four top-quality fans that are mounted using special mounting hardware which eliminates noise caused by normal fan vibrations. The unit operates on DC voltage and by adjusting the voltage, the unit can be run silently or more aggressively depending on the application. The fans can also be reversed and the unit oriented to blow air upward or downward. This unit is ideal for a variety of applications including rack mounting, mounting inside cabinets, behind recessed TVs, etc.