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. A stackable fan for better component ventilation There's one problem with stacking components - excess heat has nowhere to go. The ATM Dual-mode Component Cooler solves that problem. You can place it either under a component, or between two components. Powerful fans and an open design keep the air flowing and your gear cool. Two operation modes The cooler ships in "heat shield" mode, ready to place on top of a heat-generating component like an amplifier or receiver. In this configuration, the fans blow downward, and the unit provides a heat shield for a component above, like a Blu-ray or CD player. You can also install the fans with the direction of the flow reversed, to place the cooler in "base" mode underneath your heat-generating amp or receiver. A remote sensor attaches magnetically to the gear you want to monitor. The fans run continuously at an idle speed, then switch to normal speed if the temperature reaches 90 degrees . What's in the Box: 1. Fan assembly (attached 23" power cable and 12" thermo probe) 2. AC Power supply with 6' cable (9VDC/800mA output) 3. Thermal probe mount with adhesive backing 4. One 4" wire-tie 5. Installation instructions