Amazon.com: Accessory USA 12V AC DC Adapter for Logitech MM50 970173-0403 iPod Portable Speaker System P018WA1207 12VDC Power Supply Cord : Electronics
NTA2335 Battery for Logitech mm50 Portable Speaker System for iPod - Walmart.com
Logitech mm50 review: Logitech mm50 - CNET
Logitech mm50 review | TechRadar
Best Buy: Logitech mm50 Portable Speakers for Apple® iPod™ and Most MP3 Players Black 970173-240
Logitech mm50 Portable iPod Speakers - The Gadgeteer