The Microsoft Zune Home AV Pack is a black AC-USB power supply adapter designed specifically for Zune media players. It is compatible with various Zune models including 30, 8, HD, 16, 4, 80, and 120. The adapter is made of rigid plastic and can also charge headphones, earphones, MP3 players, and speakers. This remote power adapter charger dock is essential for keeping your Zune devices powered up and ready for use at home.