TunePower keeps the music playing even when your Zune's internal battery is drained. It offers a great solution for long plane flights, hikes-any time you want to extend your music and video playtime. A foldout kickstand positions the Zune at the perfect viewing angle. The rechargeable battery is cheaper to maintain and is better for the environment. TunePower also features a protective-case design to prevent damage to the connector from dirt, dust, or impact.