Interior siren analogical route I remove with optical indicator. Equipped with transmitter / recipient route I remove. Equipped with double source for batteries of lithium that guarantee the functioning of the siren for 5 years being this one, totally supervised. He has acoustic exit of up to 97dB and 32 eligible tones. Cadence of the eligible flash (1Hz or 0,5Hz), with technology LED. Code of coverage EN54-23 W-3,1-11,5. He has sign of breakdown of tamper, to prepare the equipment of not wished extractions or of physical hurts.