The Modularm MD-1 adds hands free occupancy detection to your walk in. Connected through low voltage wiring to your 75LC multi-monitor The MD-1 will turn on and maintain your lights for the duration of your stay in the walk in using the lighting control feature provided by the 75LC multi-monitor. Adding the MD-1 will increase safety by activating hands free Auto-panic.. No reprogramming needed, the 75LC multi-monitor Auto-detect will pickup a connected MD-1 and reprogram itself for the most common settings. The MD-1 comes mounted on a standard 4X2 plate.