Outdoor sensor falls after 14 months now for the 2nd time from (no battery problem). After synchronization with the display device it is running again. See also other customer reviews about the issue. Should it fail once again give the device within the warranty period on Amazon back. Addendum dated 23.02.13: Now the main unit is down again after one year of operation. Tried two new outdoor stations, there are no outside temperature display. That's enough for good. It is this product is China scrap which is sold far too expensive for this service. One star for the efforts of TFA that supply me for 3 years with free replacement devices.
