Radios can be found through the Aperture Science Enrichment Center. On March 1st, 2010, a Portal update expanded its role within the game, using it within an alternate reality game to promote Portal 2.
This radio is always set on 85.2 FM, playing an upbeat, instrumental version of "Still Alive" when switched on, they can be found in Relaxation Vaults or maintenance areas. Any radio will disintegrate when brought through an Aperture Science Material Emancipation Grid. Originally, the music would merely stop when doing so. After the March 1st, 2010, more sounds can be heard (this is "dinosaur_fizzle.wav"). However it will not be destroyed if thrown in toxic waste, and will sometimes float. Radios are not destroyed when being thrown into an Aperture Science Emergency Intelligence Incinerator either.