Based on bounds of a period of reduced operation for a base device, a base device generates a power management message for transmission to a peripheral device. Between creation and end-of-life, data set storage changes may be recorded. The first comb-tooth electrode includes a plurality of first electrode teeth each having a first conductor, an insulator and a second conductor laminated in the direction of the oscillating motion, where the first conductor and the second conductor are electrically connected with each other. Further, a carrier including a porous material treated with an acid anhydride functional group-containing silane coupling agent represented by the following Formula, a blocking agent that is immobilized to the porous material; and a method for producing it is provided. Having been constituted as above, it allows passengers seated other than in front seats an easy access to the desired device 200, remarkably improving the convenience of the apparatus.