What radio channel systems do you install more often?

IVS Signalspetsavtomatika

Company was established in 1991 as a distributor of fire alarm systems and fire detectors. In 1997 it started manufacturing own products. Nowadays the Company has already developed and produced a large range of fire detectors: free-standing and wire detectors, detectors with built-in siren, desk-size detectors. Also  IVS Signalspetsavtomatika Company produces a series of announcers.