Ideal for maintaining proper temperatures of bulk food during transport. Both sides maintain food product at safe temperatures without power for up to 30 minutes. Heating is recirculating forced air downdraft design. Heated compartments have a vented tunnel in back for even heat distribution, and maintain a temperature range of 180 to 200 degrees F. Single on/off switch controls both compartments. Mechanical thermostats with light powered digital temperature read-outs function when unit is unplugged. Stainless steel interior and exterior. Removable gasket ensures positive door seal. One-year parts & labor warranty.