Optical-Acoustic warning device for fire alarm according to EN54/23 and EN54/3. Appropriate for wall or ceilingmounting. Dispose of 32 alarm tones selectionables including one of bell. The high performance LED flash provide a omnidirectional light covering. Automatic synchronization. Fulfill CPR construction standard, EN54/3 + EN54/23 Category C/W and RoHS and WEE environmental standards. This device is not appropriate for outdoors or wet environments. In this case, you can use the following optional bases and accessories CWR, PS189, PS188.