With the adoption of world advanced technical solutions, the Longertek VF controller will be able to realize as follows: The world advanced technology was used in Longertek inverter controller, it can realize as follows: 1)The starting current is so small that it is only 1/7 of the normal air conditioner. The system started current will be so small that is only 1/7 of the normal A/C. 2) Eliminate the large vibration and noise generated by start and stop of the machine. Avoid the strong vibration and noise when the A/C is turning on/off. 3)The refrigerating and heating speed will be twice faster than normal A/C. 4)High precision of temperature control: The room temperature could be controlled up to the precision of +/-0.5°C, which will give the human a comfortable feeling. 5) Fast adjustment of temperature: obvious effect of refrigeration or heating; 6) large scope of applicable power supply 7)the A/C with Longertek inverter controller can save more than 30% energy. 8)Dc motor can be used with inverter controller to make the noise of the air floating much lower. The air floating has low noise; the DC motor could be adopted. 9) The remote control can be used as an option.