Portable Stereo Alarm Clock Speaker System for iPod. EXB for enhanced bass response. Reson8 Stereo Speaker Technology. Built-in docking station charges and plays iPod. Flip back protect travel cover/stand. Wake and Sleep to your iPod. Sure Alarm Battery Backup. Aux/MP3 line-in jack to listen to other audio sources. Operates on included universal power adaptor for iPod (US, EU) for international travel) or Batteries (4 AA not included). Universal well, compatible with any generation iPod.