Keeping portable entertainment devices charged has never been easier. Carry a PowerLine 90296 Duet Universal AC USB Port Charger for iPod and iPhone, Zune, Blackberry and other compatible USB chargeable devices then just plug in and charge up. Duet allows you to charge two USB devices at the same time. No need for multiple, expensive adapters when Duet does the work of two! No computer required to charge your USB chargeable devices at home, at work, in your dorm room, at the airport, at your hotel - anywhere and everywhere.