Power supply; 12/24V DC or rechargeable battery temperature Low to -18 degree C. Basic Feature:Compressor cooling system in high efficiency (reach 0 °C within 30 Minutes)Rotary compressor, workable at tilted angle up to 60 °Compact size, fits in all carsLED display& IC Control Reliable & effective Protection against Low Car BatteryEnvironmental friendly refrigerant R134aGrey color, with handle ...