Denver PET immune PIR motion sensor for use with DENVER HSA-120 & SHA-150 home alarm system

* This is a new PET immune PIR motion sensor for use with DENVER HSA-120 & SHA-150 home alarm system. * With battery with up to ½ year lifetime before it needs changing (uses 2 x size "AA" batteries). * Wireless connection with DENVER HSA-120/SHA-150 controlpanel. * Won't react on pets, but if a human walks by it will sound the alarm.