Pairing a portable electronic device with a media device that is playing media, providing control to the portable device, displaying information about the media being played on the portable electronic device, and providing a link to the media asset in an online store. In some aspects, the invention provides methods, and related devices and device components, useful in combination with a mass analyzer for the mass spectrometric analysis of analytes derived from biomolecules in biological samples including biological fluids cell extracts, and cell lysates. The coils have a different sensitivity with respect to a field generated by the sample.