The 4 GB Slacker Portable Radio Player from Slacker plays all of your personalized Slacker Radio stations everywhere you go. It lets you play up to 25 Slacker stations and also lets you switch radio stations in and out of your device at any time. You can connect to the Slacker music library over Wi-Fi when in wireless range, or over USB when attached to an Internet connected PC. Instead of live streaming of songs, the player quickly fills itself up with personally selected music each time you connect. Since it plays from the music library of your device, you can play your songs anywhere and everywhere you go even if you are not connected.