This radio still has the same frequency as the others. In Portal 2, a radio can be found one of Rattman's dens, playing ' Exile Vilify' by The National, with a mural containing odd lyrics painted on the wall behind it. Radios are destroyed when taken through Emancipation Grills, however after the Portal ARG update they will instead emit another sound. However, when some of them are played through an SSTV decoder, the sounds reveal images, with letters and numbers, which lead to a now defunct BBS server (see the Portal ARG article for more details). Since the Portal ARG update, when moved to specific locations within the test chamber where they are found, they will play seemingly random sounds consisting of noises and beeps, and the light turns green.
They also initially have a red light on them. When they are initially found in test chambers in Portal, the radios are set to the frequency 85.2 FM, and play an instrumental version of ' Still Alive'.
