Monoblock design, no need install mechanical compressor feed by engine. easy to install. Just open hole, fix it, connect wiring, that's it. 3. Save Vehicle fuel&engine power. 4. Fast cooling. 10miutes will feeling cool. Technical Data . Model NO. T20B. Cooling Capacity. 2.2-2.5KW/8,500BTU. Voltage. DC12V/DC24V. Current. 48A(12V)/33A(24V) Evaporator Air Flow