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Amazon.com: Wireless Motion Sensor LED Light - Motion Detector Alarm Chimes Door Sensor with 500 FT Range Security Alert Monitor System for Home, Business, Store, Office, School : Electronics
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Automatic Door Motion Sensors for Commercial Doors | Barron
HENDUN Motion Sensor Doorbell, Door Chime for Business, Store Welcome Buzzer Monitor, Commercial Door Entry Alert,Motion Detector Alarm, Caregiver Reminder for Elderly, Visitor Bell Dinger - Amazon.com
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DS100 - Window & Door Entry Sensor
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Infrared Motion Sensors for Automatic Doors - Hotron
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Motion Activated Door Alarm that Sounds Chime at Door