Do you need a reefer unit for your catering company or food delivery company. Save thousands by not buying a 40,000 dollar reefer truck and purchase this portable VOLT AIR technology unit. Runs on a 12 volt battery and inverter system and the temperature range is 4 to minus 18 degrees. this unit fits into cargo trailers, cube vans, sprinter vans and transport trailer trucks. This unit was used to deliver ice cream and other frozen and refrigerated units in a dry temp mixed truck load.