Acoustic Research ARS13 Portable Audio System for iPod, iPhone, iPad for $14.99. Shipping is $5.00 for a total of $19.99 shipped. Here is a screenshot for your reference. This universal dock is compatible with popular models including iPhone 4, iPad 2 and iPod nano (1-6the generation) and features play/pause, power, volume up/down functions. Most places have it for about $38.