A data reader system includes a plurality of indicia readers for reading symbol indicia and producing a symbol signal representative of the symbol indicia. More particularly, the USB-compatible apparatus integrates a mobile communication module and a WLAN module into a singular USB apparatus. The receptacle may have an insulating body and electrodes in the form of conductive end caps on either longitudinal end of the body. Therefore, the working fluid flows consistently through the firing chamber. A forth fabric conducting layer also has electrically conducting fibers, electrically conducting tracks and terminals connectable to a circuit.