The invention relates to a composite comprising a thermosetting resin with a hardness of at least 55 Shore D, wherein the resin essentially consists of an ethylene \u03b1-olefin copolymer with a density of less than 880 kgm3, which resin is crosslinked to a degree such that the volume swelling measured in decaline after 64 hours at 23\xb0 C. The actions include executing one or more software applications on the device. The indicating device is visible from the exterior of the delivery device.