IRC Dimming Version, 2-zone, 2-relay, 120V/277V AC, Title 24 compliant, ASHRAE 90.1 compliant. The Leviton Integrated Room Control (IRC) combines single room occupancy sensing, daylight harvesting, 0-10V dimming, Partial ON, Partial OFF and demand response capabilities into a single, easily installed package. IRC Features several methods of Ladderless Commissioning for install-and-forget convenience, including the AutoCal feature which automatically sets the maximum light output levels and calculates light loss factor for accurate lumen maintenance. The IRC ships as either custom kits or a complete kit with a factory configured occupancy sensor, photocell, and 4-button switch. The 4-button switch provides ON, raise, lower, and OFF functionality. The performance, features, and capabilities of the IRC product provide a simple and cost-effective stand-alone energy management solution to maximize energy efficiency and meet energy code mandates for virtually any commercial room control application.