Altec Lansing inMotion iMT1 Universal Mobile Audio Speaker System for MP3/iPod with Docking Station for Palm Treo 650/680/700P/770/Lifedrive Get maximum power with the Class D, digital amplifier Enjoy deep bass without a subwoofer thanks to MaxxBass technology Works with AC or four AA batteries (not included) for up to 24 hours of continuous playback Features include an input jack for second device connection, including CD and DVD players Impromptu conference calls are a breeze within Sprint or Verizon Wireless service areas with the iMT1's built-in microphone