reception of FM. Also, certain features like Wi-Fi and Bluetooth can interfere with professional-grade communications systems such as aircraft at airports. See also Comparison of portable media players Digital video recorder Internet radio device Mixtape Notel Portable DVD player Walkman Circ Tekpix References External links Collecting MP3 Portables – Part I, Part II and Part III – Richard Menta's three-part article covers the first digital audio players on the market with pictures of each player. MP3 Boombox culture Audio hobbies