Shenzhen Golden Security Technology Co., Ltd. was established in 2005, and is a professional manufacturer of security systems.Main products line as below, 1. GSM alarm systems, MMS camera alarm systems and auto-dial alarm systems used for house, supermarket, factory, office and school. 2. GSM car alarm systems, GPS car alarm systems and GPS tracking systems. 3. CCTV camera systems and DVR for surveillance. 4. Intercom systems for home, factory, office, parking lot, etc. "Offer good quality ...