A dispenser includes a body, the body including a product housing defining an interior for housing a plurality of products. The display layers include a light-emitting device that generates heat and light during use. In the high-speed mode, the prefetched data bits are transferred in parallel to 4 parallel-to-serial converters, which transform the parallel data bits to a burst of 8 serial data bits and apply the burst to a respective one of 4 data bus terminals. A timeblock index table, with an entry for each timeblock in the series, and a media packet index field with a data unit ID entry for each data unit in the media packet, are used to quickly locate portions of desired data.