Now you can monitor your walk-in with electronic precision and ease using the optional factory-installed MBWA-1 walk-in alarm/light management system. Replace less accurate mechanical thermometers, separate alarms and light switches with this one convenient unit. The MBWA-1 is designed to save energy with its door open alarm as well as its internal light timer which automatically switches off the light. There's also a panic alarm to ensure safety. Other features include an LED temperature display, high/low temperature alarms with delays, an optional occupancy sensor and an optional battery back-up