Belkin F8M027 TunePower for Zune Rechargeable battery pack that keeps your music or videos playing even when your Zune's internal battery is drained Protective case design prevents damage from dirt, dust, or an accidental impacts, and foldout kickstand design provides for easy and comfortable, hands-free viewing Provides 6-12 hours of additional play time on your Zune digital media player Detachable AC power adapter simultaneously charges your Zune and your TunePower Comes in a stylish black and silver that goes with any aesthetic, and is backed by a manufacturer's 3-year warranty