The document provides product information for the B400 Elite elevator and conveyor belt alignment monitoring system. The B400 Elite control unit detects misalignment of belts to prevent downtime and explosions. It can monitor alignment in one or two elevators. Key features include alarm and shutdown relays, LED status indicators, easy installation, and approvals for hazardous locations. Technical specifications list the models, approvals, enclosure, power supply, contacts, and dimensions. It can be used with up to four alignment sensors.