The rechargeable battery provides up to 15 hours of play time and the voice recording microphone allows you to store digital memos and notes for later. Play modes include repeat and the ability to shuffle by track or all music. Multiple equalizier modes such as Rock, Jazz, Classical, Custom and Pop increase your music listening experience. At less then 1oz in weight you might not even remember that you are wearing this thing! 40 presets for the FM tuner are included and the Sandisk Clip works with most subscription based music services.