Discover the Optex SL-350QDP, a 4-channel outdoor wired active infrared quad beam set designed for robust performance. Featuring aspherical lenses for precise detection, this model includes an LED and sound gauge for enhanced functionality. Its stackable design allows for versatile setup options. With dual modulation and a range of up to 100m, it's perfect for securing large outdoor areas. Rated IP65, it ensures durability against harsh weather conditions. Upgrade your security system with this reliable and efficient solution. Don't miss out, secure your premises now!