
I have a 4000 square meter commercial building. ft. The receiver is at the front door and the buzzer is 75 feet from the front door with two interior doors in between. The buzzer catches the signal from the front door perfectly, no problem. We also have a noisy workshop and hear the buzzer almost all the time unless we have a coffee grinder running. Otherwise, the buzzer will be heard over any main shop/mechanic noise.

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