Sounder with an extremely broad frequency range - high proportion of low tones for extraordinarily good penetration of obstacles like doors or walls. Alerting in corridors is possible, so that it is not necessary to put a sounder in every room. 64 basic tones can be selected, 80 tones are stored, that means tones for all areas of application and countries already exist (special devices are not required). 3 more tones can be selected externally. Different tones can be generated with one single device. Secure mounting - The electrical contact is only in the assembled base part. Wires can be connected according to the 'junction box' principle. No '3-hand' mounting (device - screwdriver - braid). No tension/pressure on the clamping unit, no 'pinching' of wires. IK 08 impact-proof housing. IP 66 - Locking elements are outside of the sealing area (IP), an influence on the IP protection is ruled out. Mounting methods: panel mounting and surface mounting possible.