An apparatus and associated methodology contemplating a slider body defining longitudinal extents at a leading end and a trailing end. In one embodiment, the split-tip catheter includes a catheter body defining a first lumen and a second lumen, and a split distal region extending from a distal end of the catheter body. The light absorbent layer is adapted to absorb light from the light source and convert the absorbed light into heat. The validity of effective departmentineffective department classification is determined by comparison with the value of charge counters acquired along with the department counters. The device can be either a mobile terminal, or a module for a mobile terminal.