National Security & Alarm Installers, Co. Ltd. is a licensed and insured security systems provider based in Queens, New York, serving the NYC metro area and nearby states. They specialize in designing, wiring, installing, and programming advanced security solutions like CCTV, burglar alarms, access control, and home automation. Their services cover residential, commercial, industrial, educational, governmental, and religious facilities. They also offer maintenance, troubleshooting, repairs, and free quotes with fast, professional service. Additional expertise includes biometric locks, hidden safes, bullet-proof doors, structured cabling, and VOIP systems.