Who We Are Beginning in 1985, the family owned and operated Golden State Instruments Company (GSi) has been serving the independent security industry with high quality low voltage products. Since opening our doors for business, our approach to customers has been, and continues to be, "How can we serve you?" What We Do With over 30 years of design, engineering, and manufacturing experience, GSI takes great pride in offering superior, UL listed low voltage products including: CCTV cameras, DVRs, NVRs, sirens, speakers, test monitors, power supplies, accessories and enclosures. GSI takes pride in providing exemplary customer service and partnering with our customers to provide technical design assistance for special projects. Where We Came From With the developments in 2016, we are excited to expand our product line and continue our partnership with our customers, and assist them into the challenging and exciting future. GSI is not just one of your vendors, we are your partner in business!