Apollo Integrated Base Sounder (45681-278APO)
The Apollo Integrated Base Sounder (45681-278APO) comprises of a Base Sounder with integral Mounting Base and is for use with Apollo Discovery or XP95 ranges. The Apollo 45681-278APO is designed for indoor use.

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2 tones
2 volume ranges 55-75dB(A) and 75-91dB(A)
Individual and group addressing
Unique acoustic self-test
Built-in isolator.