MP3 Player. An MP3 player is used regularly all day long by a lot people. 
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While the concept of wireless headphones is not new (FM radio frequency and infrared wireless headphones have been in the market for over a decade) these analog transmission methods left a lot to be desired. Static noise, poor battery life and limited range plagued the success of wireless headphones and as a result traditional wired headphones and ear buds have dominated the market. The new Logitech FreePulse wireless headphones utilize Bluetooth 2.0 technology with EDR (enhanced data rate) and promise to improve on all the flaws of the previous technology – but do they work well enough to justify replacing [...]
Source: http://reviews.digitaltrends.com/review4332.html
Athletes don't just listen to music. They use it. Introducing portable sport audio by nike and philips. The ACT21017 is a 128mb mp3 player. This model includes a backlit LCD display.Built-in 128mb memory. Plays mp3, windows media formatted content and future formats. 10 hour battery life. Custom eq + 4 presets. Includes musicmatch jukebox.
Of interest, another popular story talks about how to get a free MP3 Player that may be an option for some people. Will have more on ipod cellphone said later.