Two Event Laser Reflective Sensing Kit up to 100 Feet for Crane to Crane Separation and End Stop Collision Avoidance. Slow Approach and Stop Functions in Stepped Control Mode. Class 2 (visible) Laser for easy alignment. Kit Includes Pre-Assembled DIN Mounted Power Pack, Relays and Interface, Reflector, 10 Meter Data Cable, Mounting Bracket, Hardware and Instructions. N.O. or N.C. Contact Available for Each Event.