The invention relates to a component operating with bulk acoustic waves, which comprises a mount substrate, thin-film resonators and an acoustic mirror, with coupled resonators being arranged jointly on this mirror. The ground-contactable side of the bottom portion has one or more protrusions. A removable retention lever is configured to prevent movement of the moveable contact into a closing position upon the energy storage mechanism exerting the stored force to the moveable contact. The apparatus has a magnetic reader, a microprocessor, and a warning device. The mixer is configured to receive the first and second frequencies, which combines them to produce a mixed frequency. The method generally comprises combining a first layer, comprising an elastic material sandwiched between layers of nonwoven material, and a second layer, comprising a backing material and a graphically printed applied patch of material layer.