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YA11 Loudspeaker 15 / 25 W Series 8494 Audible and visual signalling device up to 120 dB(A) / LED / 5 J, ALU, Series YL60/3 Audible and visual signal... YA11 Loudspeaker 15 / 25 W Series 8494 Audible and visual signalling devices Audible and visual signalling device up to 120 dB(A) / LED / 5 J, ALU, S