We have used a similar product from Alarm Controls Products that was priced similarly until Assa Abloy bought them & jacked the price up more than double. This is reasonably priced and of good quality. It is a little loud but a 1K or 2K resistor (included with most alarm panels) will bring the volume down to a tolerable level for use as an external chime. We hide them in the bathroom exhaust fan where they are heard but not seen and wiring from the attic is easy.
I have used these buzzers for years in an engineering event with Girl Scouts and they are always dependable and loud! My only issue is occasionally they are on backorder.
This buzzer creates a very loud high pitched sound that is easy to hear when you are in another room. Constructed out of good quality material.
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Overall, my MCM experience was great! They delivered fast and as promised. Great product, great price!