Fenno dealers also held live demonstrations for the new radio line with in-store demo areas. One enterprising dealership in Vaasa had a demonstration in the front window of the store. Traffic was all but stopped. A salesman carried the control box out to the sidewalk and extension loudspeakers were placed on the sidewalk. These "wireless remote" demonstrations were very unique for their time. Many other manufacturers had radios with other forms of remote control (Fenno included) such as a wired or tethered control box or a remote box with a small built-in converter/receiver that fed the main set. No manufacturer up to this time had a completely wireless remote. Initially, the 1939 Fenno dealer catalog claimed the Mystery Control did not use a "radio beam," when it fact it was. The control box sent out RF pulses to a special receiver in the main radio cabinet.