Paradox Dual-Zone IR Perimeter Motion Detector for Indoor/Outdoor Use, suitable for sliding doors and windows, with anti-masking, relay output, compact dimensions 12 x 6 x 4.3 cm. For protecting windows, doors or fences. Range 10 m, narrow beam 0.5–2 m, relay output, requires both PIR sensors to be triggered to activate the alarm. High resistance to false alarms. Pet immunity up to 50 cm. EN 50131-2-2 Grade 3 certified. Mounting height 2.1–2.7 m.