Kit for conventional and heat pump applications up to three zones (2 heat/2 cool), TrueZONE® kit. Intuitive installer setup. Easy-to-follow, digital display uses real language to guide installer through four easy steps. Standard checkout procedure. Robust push terminals. Common-sense LEDs. Clean, professional installation. Smaller footprint. Variable-speed fan control. Discharge air temperature staging. RedLINK™ enabled for wireless operation when used with THM4000R1000 wireless adapter. Controls up to 2 heat/2 cool conventional or 2 heat/1 cool heat pumps. Includes HZ322 Zone Control Panel, AT140 Transformer, C7735A Discharge Air Temperature Sensor.