Thermo Scientific RPR1204D has a positive, forced-air circulation that maintains temperature uniformity at all shelf levels. Its high-density, CFC-free urethane foam insulation protects cabinet from ambient temperature fluctuations and a setpoint security with key-operated, triple-position master switch controls power to all systems while its battery backup assures control panel function during power failure. It features a heavy-duty, industrial-grade, hermetically sealed quiet compressors and automatic defrost that maintains optimum cooling capacity. This unit also has an automatic condensate removal, spring-loaded door closures, directional air flow, adjustable full-extension stainless-steel drawers and many more to ensure a suitable refrigeration system for storing products that demands constant temperature and security.