Shenzhen Dowin Lightning Technologies Co., Ltd:Founded on the ability to provide custom engineered solutions for unique surge protection circumstances, DOWIN has the proven capabilities to design, develop and manufacture surge suppression solutions for communication network requirements. Our innovative product offering includes AC | DC | signal system (including Analog, Digital and RF) lightning protection products for global telecommunications, rail and industrial applications. To compliment our surge protection product offering and innovative engineering designs, DOWIN also provides professional support services through site surveys, OEM design, consulting and network installation services throughout China . Protection Technology Group : The Protection Technology Group, part of Smiths Interconnect, includes five brands; Dowin, LEA International, PolyPhaser, RO Associates and Transtector Systems. As industry leaders in surge protection, the Protection Technology Group provides expertise in consulting, design and manufacturing of RF, AC, DC, data and signal surge protection, communications power cabinets, EMP protection and power quality engineering services. Working across the organization the group provides valuable end-to-end power and signal integrity solutions for markets that include telecommunications, medical imaging, transportation, energy, security and the military. About Smiths Interconnect : Smiths Interconnect, is a leading provider of specialized electronic and radio frequency products for the wireless telecommunications, aerospace, defense, and medical markets. It is part of Smiths Group , a global leader in applying advanced technologies for markets in threat and contraband detection, energy, medical devices, communications and engineered components. Smiths Group employs around 22,000 people in more than 50 country.