Aspects described herein provide for the design and fabrication of a device with an enhanced pyroelectric response signal comprised of multi-capacitors that are connected in series. The fastener has at least one resiliently deformable snap-fit member which, in use, is inserted from a first side of the components through a channel extending thereacross. The display system displays a stereoscopic panoramic image to a viewer by displaying left and right panoramic images such that each is viewed by a respective one of the viewer’s eyes. The LED can also function as a battery level indicator that changes color when the battery packs level of charge is depleted to a predetermined level.