Visonic's TOWER-40 MCW detector, with extended range of 18 meters, is an ideal intrusion detector for commercial applications and large residences. Based on patented V-Slot mirror technology and incorporating multiple features, the detector provides high detection sensitivity and performance, and high immunity to false alarms. Features include: Multiple curtain coverage with true "creep zone"; down-looking optics; back tamper; and isolated battery compartment for easy battery replacement. The small, recessed, and robust V-Slot window design provides high resistance to environmental interference and vandalism.