A downhole tool for extracting a sample from a subsurface formation includes an emitter of electromagnetic energy configured to heat water in the subsurface formation. The pressure sensitive adhesive composition comprises a random copolymer of isobutylene and paramethylstyrene, and a tackifier, wherein said random copolymer contains 1 to 20% by weight of said paramethylstyrene and has a cross-linked structure. The electroluminescent element is provided on the first surface of the transparent substrate. In another embodiment, the olefin cracking reactor is a moving bed reactor. To provide a high-performance network for multimedia boxes, which allows a decentralised servicing of the multimedia boxes, it is provided that at least one management station comprising a computer is connected to the data server by means of a second data link and to at least one multimedia box by means of a third data link.