An electrical connector includes an insulative housing having a base portion with a front face and a rear face, and a protection portion extending backwardly from the rear face. A location of the mobile device within the building may be determined by placing, moving or snapping a reference location of the mobile device onto a trail according to the received historical location trail information. 01 and 50, preferably between 0. The laser may further comprise a tuner or tuning assembly operatively coupled to the grid generator and configured to adjust the grid generator to the selectable communication grids.