Altec Lansing IM4 Portable Audio System Portable battery-operated stereo system shares the sounds A highly efficient Class D amplifier powers 4 full-range micro drivers Dual inputs allow you to connect 2 audio players at the same time (second cable not included) Perfect for portable CD players, MP3 players and DVD players 1Hx5.3Wx10.25L"; 2.4 lbs.