A brake system for a motorcycle includes a pressure-regulating unit interposed between a fluid pressure-generating unit and a wheel brake. An aspect of the invention is to stabilize the injector by attaching the mixing plate to the feed line to provide such stability. The mouse has a pairing information memory storing pairing codes for establishing data transmission linkages between the Bluetooth transmission device and at least one information processing systems. The system will then perform speech recognition of the user’s voice command. Optionally, the pyramidal three-dimensional thin-film solar cell may be mounted on a rear mirror for improved light trapping and conversion efficiency.