I bought the indoor siren as an adjunct to SA2500 alarm. The commissioning was not a problem. Visually see the indoor siren also good. The alarm volume is good. What I do not like the loud chirps that the internal siren outputs in parallel to those of the base station with confirmation tones. With the base station you can choose between different volume levels, but in the indoor siren are always the same loud, very loud. This also applies to the beeps of the entrance and exit countdown. In addition, you can hear near the indoor siren a kind of noise. Seems to come from the sound module. But no longer be heard at some distance. Why is there no nameplate voltage and power is a mystery to me. Would be interesting to know how the power consumption, without having to measure separately.
