JBL Dock and Headphone Bundle - Black (JBL OSM2/TEMPOBUD) Features: LED Display, iPod Connector, Speakers, MP3 Player Operational Controls, PC and Mac Compatible, Magnetically Shielded, Audio Output, Built-In AC Cord Model Compatibility: iPod Touch, iPod Classic, iPhone 3G, iPhone 4, iPod Nano, iPhone 1st Gen, iPod Mini, Zune, iPhone 3GS Media Type Compatibility: MP3 Number of Speakers: 2 Functions: MP3 Player, Built-in Speakers, Docking Station Power Source: Electric, Battery-Powered Adapters, Remote Control Not Included: iPod, iPhone Battery Required, not included: 4 AAA