It is a japanese technology.It is a electronic ac . I purchased these ac after few months ago.My ac is 1.5tone.Cooling of these ac is great.I am Only 15 minutes on the ac they chilled the my room. And Customer care service is very fast.There is no any disturbing Sound of these ac.It is very reliable. After purchasing this ac I am fully satisfied. But its price is very costly to others. But they consume less and less electricity to others.