The compact Stiletto 2 is a 4.3 oz portable radio which is capable of receiving live SIRIUS broadcasts via both satellite and WiFi signals. Internal flash memory is used to store SIRIUS content as well as MP3/WMA files for non-live playback. Listeners can easily bookmark songs using Stiletto 2, tagging favorite songs for purchase using any Windows based online music service. Additionally, the Stiletto 2 supports removable microSD flash memory enabling users to expand memory for the storage of their digital music.