24V Passive Infrared (PIR) Wall Switch Sensor. Occupancy (auto-on) and Vacancy (manual-on) operating modes, 1 relay mode for single-level switching, 1,000 square-foot, 180 degree coverage. 120/277VAC, 50/60Hz, no minimum load requirement, zero arc point switching. Title 24 and IECC and ASHRAE 90.1 C