Audyssey Audio Dock Speaker System for iPod and iPhone Wireless music streaming via Bluetooth Computer connection to charge and sync with iTunes Built in speakerphone for answering calls Innovative audio technologies for rich sound iPhone app for customized sound and EQ Power Requirements: Input Voltage 100VAC-120VAC (50/60 Hz) Factory set based on location / 220VAC -240VAC (50 Hz) Factory set based on location