Belkin FM radio transmitter (Loyola Corners)

3.25 x 7/8 inches, uses two AAA batteries (none to share- sorry!) plugs into the 3.5mm earphone output of an audio player and sends the sound to one of four FM radio channels. Very handy for hearing things on CD and MP3 players, etc over car or home radio speakers. I haven't tried it on a mobile phone, but should work there too.