Longertek is a high-tech company, located in Qingdao, where we strive to improve air conditioning inverter and system control techniques. Longertek Software, Longertek Electric, Longertek Technology and Shandong Longertek Co., Ltd. are our subsidiary companies. Since the foundation in 1990, our company has adopted the "Advanced techniques for a good life" slogan (also as management philosophy). Attention continues to be paid in terms of Technique, Capital and Marketing. Longertek is committed to the world standard R&D, Production and sale of Air Conditioners. After 10 years of research, we have development advanced inverters. Longertek has manufactured over 5 million sets of inverters. Many air conditioner manufacturers in the USA, Taiwan Area, Italy and Malaysia insist on using Longertek components. World Class Inverters, proprietary PMRV controllers and advanced

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