A-szcxtop Mini 3.5mm Pillow Speaker for Mp3 Mp4 Music Player Phone iPad iPod PC Radios With a 3.5 mm plug, suitable for most electronic devices such as iPod, MP3, MP4, CD players, radios, etc. MP3, MP4, CD players, radios, etc. 40 mm big unit, black rubber diaphragm. The sound quality is better. Just put it on your pillow and put it into your MP3 player ,listen to music and does not interfere with others. Made in China and Exported.