In some embodiments, an electronic device includes a host processor and a module, coupled to the host processor, to communicate over a wireless network using a first wireless communications protocol. Such endo-instruments have predetermined working rotation areas and comprise maximally permissible torque load limits according to the materials thereof. A Si1xGex layer is also disposed between the electrically insulating layer and the unstrained silicon active layer. The bars each has a stop engaged with the support for sustaining the support and the seat in place.