The Advanced and Dual Advanced System Controllers (TC-ASC/TC-ASC-2) are programmable thermostats that are ideal for controlling cooling units within an AV system. Both units come complete with everything you need to control your cooling system including the temperture control sensor/s, fan power cable/s, and power supplies (Additional power cables required for multiple fan units). These units are only for low voltage fans and automatically turn fans on and off based on temperature. For more advanced, specialized applications these units also feature low voltage triggers for on and off control as well as contact closures that act in conjunction with advanced alarm features.