Approval: VdS. Optical warning device for fire alarm according to EN54/23. Suitable for wall and/or ceiling mounting. With high performance LED flash and omnidirectional light coverage. Automatic synchronization and flash frequency of 0.5 Hz. Complies with the standards of the CPR construction, product EN54/23 categories C/W, and environmental RoHS and WEEE. It includes standard base. This device is not suitable for outdoor or humid environments. In these cases, the optional bases and accessories CWR, PS189, PS188 should be used. The use of the high base reduces the dB output by about 4 dB on average.