The Wattstopper FSP-211 is a high/low PIR fixture mount sensor rated for 100347VAC single phase or 208/230/480VAC phase-to-phase, designed for multi-level occupancy and daylight-based control in commercial and industrial outdoor luminaires. Mounting within the fixture housing, it delivers bi-level switching to reduce energy use during unoccupied periods while sustaining a low-level ambient output. The broad voltage range makes it suitable for both North American and international distribution systems.