Share your digitized music three ways with the iKit.  Share with one other person using the earbuds and signal splitter, or share your music with the room using the iTopper Speaker or the Foldable GoStereo Speaker.  The Portable iTopper Speaker runs on 2 AAA batteries (not included).  The Foldable GoStereo Speaker runs on 4 AAA batteries (not included) or AC power (adapter not included) and includes a stand for your iPod.  Compatible with the standard headphone jack of any iPod, MP3 player, PDA, PSP, NDS, CD player, or laptop.