This is the Friedland D792 underdome black bell - with a loud ring, 85db at 1m. Great for both commercial and domestic applications. It requires a transformer (8V AC). Known for the quality and reliability of their products,
Friedland have been a leading UK manufacturer of door bells for more than fifty years. The D792 Underdome sounds a loud ring (85dB at 1 metre) which makes it ideal for both domestic and commercial properties.
Please note: the Underdome requires a transformer (see TR1) in order to be connected to a push button (see D814F and D824F).
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