This item is provided by Crutchfield.com and includes free phone technical support for the life of the product. Details on how to take advantage of this service will be included with your package. Should you have any issues locating information on how to contact Crutchfield Technical Support, please contact this website's Customer Service department. The ATM Cool-stack I system is a great way to keep your rack-mounted components cool. Mount this array low in your rack, and place its heat sensor on your hardest-working component. The thermostat activates the fans when the sensor reaches 90 degrees . The quiet fans efficiently pulls cool air into the rack. Add a Cool-stack I Exhaust (available separately) for optimal airflow throughout your cabinet. The Cool-stack I mounts in a standard audio rack, and comes with its own AC power adapter. What's in the Box: 1. Fan module (intake) 2. Thermal probe (attached 71" cable) 3. AC Power supply with 6' cable (9VDC/1.3A output) 4. Thermal probe mount with adhesive backing 5. One 4" wire-tie 6. Installation instructions