The invention is an improved audible signaling device with a speaker, a sound chamber, and associated circuitry. Each of the plurality of cell array blocks includes cell arrays and sense amplifiers. The active ingredients of the biocidal composition behave synergistically and are ideally suitable for controlling bacteria, fungus and algae. The probe is held within the cylindrical section of the container by a locking means that allows a single dispensation for its use and enables its disposal after use in an inaccessible manner, so as to enable its attachment and detachment to the non-disposable segment of the device such as an ultrasonic probe handle without requiring direct handling by the user. A described embodiment of the present invention gives the mapping module access to the event under construction.