2.11 ounces
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Stemedu 5pcs HC-SR501 PIR Infrared Motion Sensor Human Body IR Movement Detector Sensor Module for Arduino for Raspberry Pi
$9.49Make sure this fits by entering your model number.
Use Potentiometer 105, output timing is from 0.5S to 200S
Reference links: https://www.mysensors.org/build/motion