Microporous material having a spherulitic matrix made from ethylene chlorotrifluoroethylene copolymer has a plurality of pores having an average pore size greater than about 0. The EPL includes a container, electronic circuitry, including a display, in the container, and a transparent lid over the container to expose the display. A group III-V barrier layer adds strain to the channel. A hanger cord has opposing terminal cord ends fastened to the rear panel, and slidingly threaded through holes in the front panel.