Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The active material comprises a first metal oxide particle and a second metal oxide particle group formed on the surface of the first metal oxide particle, and the second metal oxide particle group contains a zirconium oxide particle and a silicon oxide particle. It also includes a first prism configured to align the first and second image radiation beams, and a second beam splitter configured to split the first and second image radiation beams into four image radiation beams. The second menu includes a device menu including an option to specify a device order in which to send the reminder to a plurality of devices. A second cable is preferred, with one cable deployed from each end of the elongated body, preferably a PR-24 form factor baton. Moreover, the method comprises terminating the iterative decoding process of the FEC block based on the one or more stopping criteria.