Paradox

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)
Extremely reliable and false-alarm free
Patented Digital Motion Detection (no analogue circuitry)
Digital Auto Pulse Signal Processing
Digital Shield algorithm software
Metal shield maximizes protection from EMI and RFI signals
10.5m (35ft) X 10.5m (35ft) range with 90° viewing angle