Infrared Monitor with Pet Immunity 2) The Optex VX-402 is suitable for almost all outdoor applications
because it combines two PIR's, creating extra high immunity against
false alarms caused by small animals, cars, and other outdoor
Infrared Monitor with Pet Immunity and Recordable Alarm 3) The Optex VX402REC model features a voice record option which lets you
record two different messages for different alarm situations. I.e. "Welcome to our store" during business hours and "Intruder Alert" for after hours.