Keyword spotting may be improved by using a competitor model. The handpiece 10 has a gripping portion 11 to be gripped by an operator, a head 15 mounted at a distal end of the gripping portion; and a wheel 55 rotatably mounted in an interior of the head. The secure element may include a matcher and an enrolled template database. A second pattern is provided in a designated location of the second layer, such second pattern having a given shape and a given size, and having at least one discontinuity formed therein at a predetermined location. The first bridge contact is substantially flush with the first planar surface.