Also near field across your head? Let's assume the antennas used are electromagnetically short. The metal strips appear to be the antennae, they're a bit under an inch total AFAICT, so about a 4 inch wavelength if they're 1/4 wave dipoles. But that is in a licensed band, to drop it to the 2.4 GHz the antennae need to be a bit longer, so we'll assume they're electromagnetically short. My head is about 6 inches across at the ears, which is into the transition zone for 2.4 GHz (or higher) radiation. So the near field bit seems iffy to me. Either way it's into the Fresnel region, so it's primarily radiative and not reactive.
Also, I have 32GB of music, and I like to listen to pretty much all of it on shuffle. One album in MP3 format is about 150-200 MB, 300+ for FLAC. a music player that stores one album isn't very useful.