Shenzhen China-Top Security Co., Ltd. We are a professional manufacturer of wired and wireless security home alarm systems, 3G camera alarm systems, GPS tracking systems, GPS monitor software, IP cameras, CCTV and DVR surveillance equipment, GSM car alarm systems and wireless security equipment for home safety and baby monitors. Highly Skilled Workforce and Facilities We have 500 workers including 80 hardware and software engineers and 60 marketing personnel. We also have imported three new SMT machines, Caller FSK/DTMF tone/pulse telephone analyzers, analog oscilloscopes and wireless RF shielded chambers. Export Markets For your assurance, our products passed CE0678, RoHS and FCC certifications. They are exported to the US, Europe and Africa.