Manuals for Gemini alarm systems are available at NapcoSecurity.com. Download a manual as a PDF file to read on the computer, or print it for future reference. Manuals are available for various Gemini DXK, DXRP and RP3DGTL systems, among others. NapcoSecurity.com also offers manuals for other Napco products as free downloads.
Gemini is part of the Napco group of companies. Along with alarm systems, Napco's various companies produce PIN and card-based access systems, Internet video products and secure cylinders. Napco recently acquired Marks USA, a company that produces locksets and access control products including card readers and fingerprint readers. Napco's fastest-growing product group is the Alarm Lock division, which produces panic exit devices for use at universities and other institutions.
Gemini products are highly rated on Amazon.com; the GEM-RP1CAE2 keypad has a five-star user rating as of December 2015. User reviews state that the keypad is easy to install and works well. Amazon.com carries other Gemini products, including security panels, glass break detectors and heat detectors. A wireless keyfob and virtual keypad are also available, for users who are extending an existing security system. As of December 2015, all products have received at least a three-star customer rating on Amazon.com.