The present invention provides a user configurable computer interface for managing inventory. The assembly includes a weld gun having first and second electrodes movable relative to one another between an open position and a closed position. The spacing between the mirror determines the efficiency of elastic and inelastic scattering of electromagnetic radiation inside the microcavity, and hence, determines a resonance wavelength of electronic radiation that is coupled to the microcavity. A gate driver is connected to the plurality of gate signal lines, and it receives first and second voltages and outputs any one of the first and second voltages to drive the gate signal lines sequentially. Also, the open direction, and the bookbinding unit are also expressed on preview images. When the switch or outlet needs to be removed or replaced, the band is slipped back off the wires and may be reused once a new outlet or switch is installed.