The Samsung S2 Pebble is perhaps the most stylish MP3 player we've come across in the ultrabudget category. Jutting out from the bottom right of the control pad is a smart key, which is used for placing the player in shuffle or playlist mode, turning the LED function on and off, and switching through a set of three sound effects: Normal, Studio, and Concert Hall. The playlist mode is a nice extra that lets you create and listen to an on-the-go playlist. The S2 plays back files in the MP3, WMA, and OGG formats.