Paradox DG75 Indoor Digital Motion Detector

Features:

Extremely reliable and false-alarm free
Dual optics (2 dual opposed element sensors)
Provides superior pet immunity using a patented combination of advanced optics and digital processing technologies
Immune to pets weighing up to 40kg (90lbs)
Digital Dual Opposed Detection
11m (35ft) X 11m (35ft); 90° viewing angle