An apparatus for a vehicle that has a propulsion mechanism capable of causing injury to a bystander located proximate to the propulsion mechanism when the propulsion mechanism is started comprises an activation switch, a speaker, and a sound controller. The filtration media are produced using a fluorothermoplastic material, such as a terpolymer of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene. The coupler is a flanged base or a base having radially projecting legs wherein either the flanged base or the radial legs are detachably connected with the hub. The selection unit accesses the storage unit and selects a first operating parameter for operating the memory cells from among the plurality of operating parameters stored in the storage unit, based on a first instruction input.