1) Intelligent control and display technology 2) Wide voltage design 3) Dual air guide plate technology 4) Memory functions 5) Sleeping mode automatic control 6) Audio prompt diagnosis on failures 7) Timed switch-on and switch-off 8) Refrigerant: R47 9) Capacity:7000/9000BTU 10) Voltage: 220V/50Hz or 220V/60Hz