Embodiments of the present disclosure provide methods for sharing information during a customer service session. The base includes a cavity bounded by a plurality of sidewalls, at least one slide-rail set on the sidewalls, a hole defined in at least one of the sidewalls, for allowing cables to extend therethrough, and a protrusion set on the at least one slide-rail. The layer has peaks in a range of 397 eV through 401 eV, a range of 414 eV through 418 eV, a range of 534 eV through 538 eV, and a range of 540 eV through 547 eV, respectively, in a spectrum measured by electron energy loss spectroscopy using a transmission electron microscope. Only the first section formed from interspaced reflective andor refractive deflection elements causes a deflection of the second beam cluster by reflection andor refraction, such that the first beam cluster forms the common beam cluster with the deflected second beam cluster once it has left the body.