Alarm Specialist & Electronics provides service, installation and monitoring of alarm systems, fire systems, camera systems, access control and networking.

Sentry Security is a professional security company based in St. Louis, Missouri, providing on-site security solutions for both residential and commercial properties for over 50 years. The company specializes in armed and unarmed security officers, mobile patrol services, alarm response, electronic guard supervision, risk and threat assessments, background checks, and security system consulting & design.

Zenitel systems interface with other security systems including CCTV, access control and alarm for a comprehensive security solution.