(. Item number 70835) on the packaging of the wireless chime sets HX action has left a clear pictogram point out what should be done: a bell next to a sensor, then a radio transmission to Gong. Law similar to the text addition: "Extended an existing bell system" So, I'm assuming that the ringing (eg an apartment bell) the sensor (properly mounted) causes trigger the Gong. Incidentally, my set has also been sold so. Installs arises after long experiments but out the following: Even at the lowest sensitivity level the gentle closing of the door next to it contained already redeemed (though without actuating the door handle, so there is a click of the spring-latch) but the sensor from the ringing does by no means the. Incomprehensible: The ringing will take place in 2 cm distance, the latch of the door lock is removed more than one meter. I need to adjust significantly more sensitive to use the ringing for a trip to the sensor so. The sensor is so sensitive that other noises, even speaking to trigger the sensor. A phone call to the manufacturer revealed: This kit is not suitable for the application are met !!! He had been developed for bell systems with speech facility (what should it go better, I have not understood). The sensor reacts not only noise but also vibrations (Wow! The latch Watt for ne Shake!). For the present application, it would take the set with the wireless transmitter an extra part (item no. 70399), the wired to the bell ringing at the Gong (item no. 70873) would trigger over the radio. When I pointed the service people to actually clear pictograms and the text, I was told that he finally does not do the pictograms. I was advised to replace the kit at the merchants against the right parts. Well then