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Shenzhen Sinda Technology Co., Ltd is a professional manufacturer of GSM security alarm systems, established in July of 2003. We specialized in designing, manufacturing and selling of GSM security Home alarm system,GSM industry alarm system, GSM MMS alarm system,GSM power transformer alarm system,GSM data acquisition alarm system, GSM Monitoring Center software,burglar alarm system,House intruder alarm system, Telephone Line Alarm System, and so on. Most of our GSM alarms are FCC & CE certified. Until now, Shenzhen Sinda Technology Co., Ltd has more than 15 hardware engineers and more than 28 software engineers,who are dedicated to research, design,and develop series of GSM security alarms. "Patrol Hawk", an old-brand name home and aboard, is the brand of Shenzhen Sinda Technology Co., Ltd. Years of experience in manufacturing GSM alarm makes it a reliable and well-noted brand. Also,based on its high-class quality, state-of-the -art technology, perfect after-sales service and sales network worldwide,which prevails in international security market and gains its leading position and honorable reputation internationally. We have been hunting distributors globally and believe that we can be your faithful friend and reliable partner forever.