Voltage: 12V/24V Air volume: 250-500m3Rated power: 400/1000W Rated current: 20-50A Undervoltage protection: 10.5V/20.5V Undervoltage recovery: 13.5V/25.5V Cooling capacity: 2000-2800W External machine: 780x427x181mm Internal machine: 630x200x186mm