For the garden I was looking for a loud bell, but could only get these Gong after I can not hear my video bell system in the garden. Well satisfies these mechanical Gong Friedland their purpose and the price - performance ratio is also OK. It was for the electrician not possible to couple them with my video equipment and so I have 2 doorbells. I can hear it now in the garden, as well as the prudent guest also pushes the right button.