Installation, repair and maintenance of sensors, detectors and monitoring instruments, measuring apparatus, communication apparatus, air analysis apparatus, ventilation apparatus, heating apparatus, automated access control apparatus, electric access control apparatus, control apparatus and instruments, verification apparatus and instruments, detection apparatus, clocks, computerized clocks, elevators and optical code readers, automatic door systems, escalators, climate control systems, fire ...

Installation, repair and maintenance of sensors, detectors and monitoring instruments, measuring apparatus, communication apparatus, air analysis apparatus, ventilation apparatus, heating apparatus, automated access control apparatus, electric access control apparatus, control apparatus and instruments, verification apparatus and instruments, detection apparatus, clocks, computerized clocks, elevators and optical code readers, automatic door systems, escalators, climate control systems, fire ...

Instant and immediate transmission of collected data by telephone, internet and radio to management and data processing centers of property owners and property managers; electronic transmission of data simultaneously to multiple recipients