Keeping portable entertainment devices charged has never been easier! There's over 100 million reasons to carry a musicPower Universal AC Charger for Apple iPods and iPhones, Zune, Blackberries and other compatible USB chargeable devices. Just plug in, charge up and play on! Duet allows you to charge 2 USB devices at once! No need for multiple, expensive adapters - when musicPower Duet does the work of two!