This blue plastic refrigerated freeze box used for tricycle with 75mm PU panels ,and works through DC48V or DC60V battery driven refrigeration units ,our standard dimensions of this cold box is 1500*1000*11000mm and chill or freeze the temperature to be -25℃ to +15℃ ,if you need ,we also provided the DC48V/60V 75ah or 100ah lithium battery together for you .