TR-550 transport refrigeration units are vehicle engine driven units, suitable for medium or big refrigerated trucks with 20~30 m³ or 5.1 meter length truck bodies. With its R404a Eco-friendly refrigerant, the cooling capacity is up to 5800W, to make temperature in truck bodies at -18℃ to +30℃. So it is especially suitable for transporting fresh or deep frozen foods, such as ice cream.