slightly modified

Before I have to push buttons, which in its solid execution equal very well liked mounted, I tried it on the desk with the provided labels. Result: The laser printing on special tracing paper (Zander Reflex 2000) sprinkled best backlight without the transmitted light "cloud" to form like ordinary paper.
The illumination of the button is also at 8 Volt supply very bright, I have therefore a 0 ohm resistor (top right of the board) is replaced by a 240 ohm resistor, and probably I will raise him on 330 ohms to an area in front of the our doorstep to achieve appropriate brightness. That triggered by the ambient light switching on / off works perfectly.

We liked the magnetic holder of the key buttons and the button has me right behind: they provide a clear sense when you press the button. There is a certain amount of pressure needed to move the button from its rest position, as a clear pressure point used by the two buttons is given behind the button. The buttons control the way once each a relay whose switch contact is ultimately at the terminals available. The meaning behind it (why not switch contacts directly?) Reveals itself to me not quite so in any case the power to the bell button imperative not only for lighting.

The installation on the wall is easy to perform, shims are made of plastic, as did dowels and stainless screws. Also the necessary Torx screwdriver is included, but not a small Phillips screwdriver to insert the labeling strips, which should not be present everywhere. In the field of cord is sufficient space to accommodate the bell wire to the screw with a replacement strap.

Missing I had a little feedback on the keystroke, especially with us the ringing can not be heard outside. So I did not let me take and the light of a single blue LED fed to the lighting when any key is pressed. The necessary three diodes, one resistor, the LED and the connections had to be very careful, however, placed so as not to block the key way in which pleasant flat case there is of course little room for expansion. I like the reached feedback effect is very good, by day as by night.

All in all, a bell push, I would recommend without hesitation and I would buy immediately.