The autonomous Sound and/or Light Alarm Block of the Sa (Satellite) or SaME (Satellite with recorded message) type Planet is generally coupled to the BAAS Pr. It is used in establishments requiring type 2b alarm equipment to give the evacuation signal. The Sa Planète range consists of three types of autonomous alarm Blocks: The BAAS which allows the broadcast of an evacuation sound, the BAAL which emits a visual evacuation signal and the BAASL which combines an audible and visual evacuation signal. The SaME type stand-alone sound alarm unit broadcasts a recorded message and/or an evacuation signal as desired.