It is presented a method for initializing a radio base station. The article of jewelry may be imaged and priced at the retail location, and a commitment to purchase the article of jewelry may be obtained based on the image provided. The user defined identifiers are stored associated with the equipment identifiers in a subscriber account. According to the present invention, there are provided a polymerizable boron-containing compound of, a polymer thereof, a polymer of a compound of and a compound of, and a polyelectrolyte for electrochemical device comprising either of these polymers and at least one electrolyte salt:. A second interlayer insulating layer having a relatively low dielectric constant is interposed between the conductive layer and the interconnections, which reduces the parasitic capacitance therebetween.