SIRENA sireeni, vaatii asennusrungon HIGH ACOUSTIC PERFORMANCE CHANNEL 1 | PRE-ALARM A powerful up to 100 dB electronic tone, ideal for alerting staff of a danger or a serious change of operating circumstances (tone selectable via dip switch “A” out of 8 tones) CHANNEL 2 | ALARM A powerful up to 100 dB electronic tone, ideal for alerting staff of a permanent change of operating circumstances (tone selectable via dip switch “B” out of 8 tones) MULTITONE 16 tones available, including fire alarm, industrial and civil tones