... 4xAA 4. No more bird PIR Motion Activated Bird Repeller(GH-192) Technique Data: Product NamePIR Motion Activated Bird Repeller(GH-192)MaterialABS PlasticPower ... , Farm, Kennels and Stables. etc. Features: When the PIR sensor detects motion, the ultrasonic speaker and LED light will activate ... the unit is in stand-by mode. When the PIR sensor detects motion, the ultrasonic speaker and LED light will ...