A V-belt continuously variable transmission for a straddle-type vehicle includes a measurement plate for a rotational speed sensor for detecting a rotational speed of a primary sheave shaft to control a speed change ratio. The window comprises a trapezoidal prism, a longer side surface of the parallel side surfaces of which forms a surface facing the medium. Both implementations result in better performance parameters. Within the lighting network or the various lighting zones, lighting fixtures may share sensor data. The disclosed power monitoring system preferably determines the instantaneous power provided to each of multiple loads by sensing the potential and phase of each conductor that supplies power to one or more of the respective loads.