Macally Portable Stereo Speakers for Sansa e200 (Black) Ultra-portable, battery powered stereo speakers for your Sansa e200 series MP3 Player Enjoy your Sansa e200 series MP3 Player without headsets or bulky wired external speakers On & Off switch to save battery power while not in use Allows full access to all controls on your Sansa e200 series MP3 Player Three AA batteries (included) last up to 12 hours of continuous use