Type: Roof top;   Rated voltage: 12V/24V single cool;  48V/60V/72V cooling and heating Compressor rated voltage: 12V-72V DC Compressor working voltage: 12V-72V available Fan motor rated voltage: 12V/24V Air volume: 250-450 m³/h Current: 30-50A Rated Power: 300/1200W Undervoltage protection: 9-11.2/19-21.5 Undervoltage recovery: 12.5/2.5;  Cooling capacity: 800-2200W;  COP≥2.5 Refrigerant: R134a;   Charging amount: 600g;  Speed range: 1600-3800 r/min External unit size: 680*220*621;  Internal unit size: 480*320*160;  Cable:16 (2-5M)