Compatible with ALL3000/34xx/3500/400x/4500/5000 passive infrared motion sensor Reliable motion detection Extremely high interference immunity Lens as standard 90° NC tamper contact Manual range adjustment (max. 15 x 15 m) Crawl-under protection with counter With 1 m connection cable ATTENTION: The ALL3051 Motion detectors require a lot of power on the I2C ports, meaning a maximum of 1-2 motion detectors can be connected. Optional: Feed in more voltage on the power supply side or use ALL4452.