Что внутри? 🤔📞кнопка вызова видеодомофона изнутри /video door phone call button from inside

what is inside the video door phone call panel? in the small case of the device, there are quite a few individual elements that work in a team and make up the outer part of the video intercom. let's analyze the call panel together and find out how it works. the button for calling the video doorphone from the inside. enjoy your viewing!