Abstract: A signalling apparatus, for a bicycle, has a battery assembly and horn assembly housing. A horn assembly sound modulation housing is attached to the battery assembly and horn assembly in a central housing. There is a first turn signal light housing hingedly connected to the battery assembly and horn assembly housing. Another embodiment has telescoping signal light housings. There is a removable, single directional lens on the first turn signal light housing and two reflector lens on the first turn signal light housing. A second turn signal light housing is hingedly connected to the battery assembly and horn assembly housing. There is a removable, single directional lens on the second turn signal light housing and two second reflector lens on the second turn signal light housing. A first turn signal light and a second turn signal light is in their respective turn signal light housings.

Abstract: A signaling apparatus for attachment to a bicycle thereon, including a cylindrical housing member, having first and second telescoping shaft members slidingly engaged within opposite ends of the cylindrical housing member. A right signal light assembly is disposed on a distal end of the first telescoping shaft member, and a left signal light assembly is disposed on a distal end of the second telescoping shaft member. There is a clamping mechanism for removably attaching the cylindrical housing member to a seat mounting post on the bicycle. A switching circuit selectively controls illumination of the right and left signal light assemblies, and is electrically connected to the same.