A piezoelectric element is attached to a diaphragm via a relay member. The floor being capable of moving up to a raised position to provide sufficient clearance for a towing vehicle to attach to the trailer for towing. The resin composite material exhibits high dielectric constant and radio wave absorbability, while maintaining fundamental characteristics of resin material. In the first mode, traffic between the first and second nodes is transmitted over the first path and not the second path. Each analyzer unit may be configured to collect data over a predetermined duration to establish a network baseline of operation, which may be used to detect future network malfunctions. The electrical switches may have similar physical geometry as the display elements.