Utilitech White Screw-in Motion Sensor and Light Sensor
Amazon.com Price: $46.00 (as of 02/06/2019 13:36 PST- Details)
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Outside motion sensor activates indoor unit when it senses motion
Motion sensor is battery powered and requires 2 AA batteries (not included)
Connect a lamp to the indoor plug-in unit, unit will flash the lamp and make a chirp sound to alert you when motion is sensed outside