Disclosed is an electrolyte for an electrochemical cell wherein the electrolyte includes a solvent mixture comprising a dioxolane and one or more of 1,2-dialkoxyalkanes of 5 or 6 carbon atoms andor 1,3-dialkoxyalkanes of 5 or 6 carbon atoms. An aspect that the silanol bond is formed by reacting a silane coupling agent with the metal oxide, and an aspect that the silane coupling agent has a reactive terminal are preferred. One of two or more different caps may be selected to be placed on the card in order to control operation of the second data transmission path, such as to select the distance of wireless transmission from one of two or more pre-set distances. This technology can be applied to a receiving apparatus that receives a signal conforming to a DVB-C2 standard.