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http://themunsessiongt.com/heath-zenith-sl-5407-bz-b-replacement-180-degree-motion-sensor-bronze-selectable-motion-timer-adjustable-motion-detection-up-to-70ft-with-led-light-when-motion-is-detected-photocell-for-night-ops/
Heath Zenith SL-5407-BZ-B Replacement 180 Degree Motion Sensor (Bronze) Selectable Motion Timer, Adjustable Motion Detection Up-to 70ft with LED Light when Motion is Detected, Photocell for Night Ops Reviews